Basically, jutsus of this affinity, instead of causing increased damage when compared to basic techniques, are used to increase chances of hitting, dodging, or tto increase he number of attacks that can be used in a turn.
As you'll notice, most of the contact formulas use [Ninjutsu] value instead of [chakra mod] to reflect that fact. Also, the jutsu's cp costs have been increased to be roughly on par with the cost of raiton jutsus (the most taxing elemental affinity chakra wise) while maintaining lower damage per usage. This was done since kekkei genkai would logically require more complex chakra to generate and to prevent spamming of these jutsus since too low of a chakra cost would make the user practically untouchable through jinton's defensive applications (which would make sense but would completely break the game system).
Basically, these techniques are made to be complementary to a fighting style rather than being its cornerstone, since, without a more than potent taijutsu background, these are practically useless.
~Limits and Abilities~
Limits
Jinton (Swift Release)

It is unknown how Swift release speciffically functions, however, it is an advanced chakra nature kekkei genkai allowing the user to transform his chakra into velocity. This ability is an unusual form of ninjutsu often wrongly confused with nintaijutsu. The error stems from the fact that swift chakra does not have any biological effect on body to increase its output, but rather accelerates anything it is channeled through. It is literally pure speed. Swift release is a very rare trait that has very seldom been documented. However, legends told that this unique ability allowed its users to generate speeds that made opponents believe they were actually teleporting from one place to another in combat.
Rank: Limit, passive
Requirements: Kekkei Genkai
Special: User may cast Swift Release kekkei genkai jutsus and use Jinton abilities.
Abilities
Gekizou Sokuryoku (Speed Burst)

Through very basic channeling of swift chakra, the user very briefly accelerates any basic movement to reduce the motion's execution time. This technique is usually applied by shinobis to accelerate the weaving of hand seals or to speed up stance shifts.
Rank: Ability, passive
Requirements: Jinton
Special:
*User may pay 5 cp when performing an action or casting a jutsu to reduce the dice rolls required to use it by 1.
*This ability can be repeated [Chakra Control / 10] times per individual attack or jutsu (for additionnal 5 cp per dice roll deducted, required number of dice rolls cannot go lower than 1).
*For every additional dice roll deducted from the first, add 200% chakra cost to the ability from the cost of the previous deducted roll (5 cp for one, 15 cp for two, 45 cp for three, etc.).
Kousokuchi (High Speed Strike)

The most basic application of swift release in combat situation, the user channels swift chakra in order to greatly increase the speed of a strike or of a throwing motion, significantly increasing the attack's velocity. This gives the opponent less time to react and increases impact force.
Rank: Ability, passive
Requirements: Jinton
Special:
*Ability can be applied to any single attack for 15 cp.
*Add [Chakra Modifier + 2 per 10 in Ninjutsu] to Base Attack Bonus.
*Add [Chakra Modifier + 2 per 10 in Ninjutsu] to damage.
~Jutsus~
Ninjutsu
D-Rank
Jinton: Jinpo (Swift Release: Swift Step)

The most basic form of the swift release. This technique is an adapted version of the Body Flicker Technique fow which swift natured chakra is applied to increase its efficieny. Based on the same basic principle as its parent jutsu, the user activates his chakra to achieve increased speeds in order to move between various spots. However, swift natured chakra is added to technique, infusing the user's body and the space in his or her trajectory, dramatically increasing movement speed. Even to the trained eye, this jutsu generates such velocity that the user may appear to teleport from one location to the other.
Cp Cost: 25 cp
Dice Rolls: 2 (can be used as reaction)
Damage: Regular attack damage.
Awareness DC: 10 + [Ninjutsu] + 2 per 10 ranks in Chakra Control.
Requirements: Jinton, Ninjutsu 20, Chakra Control 15, Sneak Attack 20, Dexterity 20, Shunshin no Jutsu
Training: 2 stages.
Stage I: Ninjutsu DC 30, Adding swift chakra to the regular body flicker technique.
Stage II: Chakra Control DC 25. Controlling the movement and distance of the new jutsu.
Special:
*When rolling initiation checks or racing, or anything that involves speed (inccluding kawarimi), add [Ninjutsu + 2 per 10 in Chakra Control] to the dice roll. Does not nullify Stealth checks.
*If technique is used while sneaking, add [Ninjutsu / 2] to Sneak Attack skill.
*If technique is used in combat, user may speed away from his opponent's sight and go into hiding if his or her adversary fails awareness check.
*If technique is used offensively, user launches an attack of the highest Base Attack Bonus of the dice rolls used to intitate this jutsu. Target must pass awareness check or the attack will be considered a sneak attack.
*If technique is used defensively, add [Ninjutsu] to Dodge, Reflex, or anything involving evasion against a single attack or jutsu.
C-Rank
Jinton: Kousokudo Kawarimi (Swift Release: High Speed Replacement)

Through this technique, the user attempts to confuse his opponent by switching places at high speed with a bunshin. Should the victim not realize that he is no longer facing the same adversary, he can spend a good amount of time fighting a decoy, giving the user time to either run away, recuperate, or set up a surprise attack. Since the clone was made while the user was weaving swift chakra, it can use swift nature jutsus in addition to its usual jutsus.
Cp Cost: 30 cp + Bunshin cost
Dice Rolls: 3 or bunshin casting turns (whichever is higher).
Damage: n/a
Awareness DC: 12 + [Chk Mod] + 2 per 10 ranks in Ninjutsu.
Requirements: Jinton, Jinpo, any bunshin jutsu, Ninjutsu 30, Chakra Control 20, Sneak Attack 25
Training: 3 stages.
Stage I: Chakra Control DC 30, Creating a bunshin very quickly by infusing your casting with swift chakra.
Stage II: Ninjutsu DC 40, Rapidly switching places with the bunshin at such a high speed that your opponent does not notice that any movement has taken place.
Stage III: Sneak Attack DC 35, Mastering the release of chakra to achieve maximum acceleration once contact is initiated with the target.
Special:
*User creates a solid bunshin of any kind and switches places with it.
*If victim fails awareness check, he or she will not realize that a bunshin has taken the user's place.
*Every turn after a failed initial awareness check, the victim may roll one free intelligence check to see through the bunshin with a +10 to DC because he doesn't know a clone tecchnique's actually been used.
B-Rank
Jinton: Semeren (Swift Release: Barrage of Strikes)

Channeling swift chakra into his arms, the user unleashes a flurry of strikes against a target, leaving practically no time to react. Given the focus of this technique on applying speed chakra in chaining the attacks rather then in increasing the speed of the attack itself, damage per strike is mostly unaffected by this jutsu.
Cp Cost: 150 cp
Dice Rolls: 4
Damage: Regular weapon damage.
Reflex DC: n/a
Requirements: Jinton, Ninjutsu 35, Chakra Control 35, Weapon/Taijutsu 35, Strength 30.
Training: 4 stages.
Stage I: Ninjutsu DC 50, Effectively charging your swift chakra into your arms to spend it as efficiently as possible to maximize the technique's efficiency.
Stage II: Chakra Control DC 45, Releasing bursts of swift chakra into your arms to launch lightning quick individual attacks.
Stage III: Taijutsu/Melee Weapon DC 45, Controlling your blows so they all land on target despite the increased speed.
Stage IV: Strength DC 22, Maintaining the strength of the blows despite the focus on pure speed.
Special:
*User launches [Chakra Control / 10] attacks at the highest base attack bonus of the dice rolls used to channel the jutsu.
*All attacks are rolled in the same attack roll.
*Attacks can be affected by any effect that can apply to normal attacks, be they positive or negative.
A-Rank
Jinton: MueishÅ (Swift Release: Shadowless Flight)

The ultimate application of the Swift Release. The user charges his body and the entire area with swift chakra to temporarily increase his speed to unmatchable levels. This technique is used to move at very fast speeds anywhere on the battlefield, rapidly striking opponents at various angles while avoiding any opposition.
Cp Cost: 250 cp
Dice Rolls: 5 to activate
Damage: n/a
Reflex DC: n/a
Requirements: Jinton, Ninjutsu 40, Chakra Control 45, Dexterity 20, Awareness 20, Jinton: Semeren.
Training: 5 stages.
Stage I: Chakra Control DC 55, Controlling a surge of swift chakra so it becomes a constant stream to your entire body.
Stage II: Awareness DC 30. Adjusting your senses to hyperspeed..
Stage III: Dexterity DC 15, Learning to dodge and keep your footing while never slowing down.
Stage IV: Dexterity DC 17, Using melee combat effectively during the technique.
Stage V: Ninjutsu DC 50, Performing complex combat movements in a constant hyper speed mode.
Special:
*Effect lasts for [Chakra Control / 15] combat turns including channeling turn.
*Gekizou Sokuryoku (Speed Burst), Kousokuchi (High Speed Strike), and Jinpo (Swift Step) are in constant effect for the duration of this technique.
*Increase number of attacks per turn in confomity with the Base Attack Bonus increase of Kousokuchi (High Speed Strike).