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Hm. One thing that you could really make good use of would be a Summoned Greater Daemon. They're cheap as all hell for their statline and they can pop up through any of your Aspiring Champions.

Your squads are all over the place for equipment. One squad that stands out is squad 4: Mark of Khorne, a Heavy Bolter, and a Meltagun? The Heavy Bolter needs them to sit still, but their other kit needs them to get up close and personal to be effective.

I'd put a Rhino on your Berserkers. Having them footslog up to the line will get them blasted apart before they can become effective.

I have never really had to make use of dozer blades on a Rhino for Chaos. They're alright, but Rhinos are cheap enough that you can potentially afford to lose one if you need to plow through rough terrain.

Defilers cannot be dedicated to a specific god through a mark.

No qualms with the Dreads, just be careful that you keep them far enough away from your other units so that they don't get quite as much damage on you in a "Fire Frenzy" result in the early game.


OVERALL NOTES FOR CHAOS:
Most of the time, it is hard to kit a squad for "all around" roles. Mixing equipment can be handy to have a squad for dedicated objective camping, though. Heavy Bolters and/or Autocannons work great for that role. Otherwise, you might look into taking 'specialist' squads for particular roles, or smaller squads to serve as objective camping and heavy weapon platforms. When I do that, I tend to take five man squads and give them an Autocannon.

On vehicles, you need to be sure that you're not spending too much. It's easy to over-upgrade with the Chaos Codex. Rhinos should be as much of a bare bones metal box on the field as possible, imo. The survivability upgrades (Daemonic Possession, Dozer Blades, etc) should be saved for vehicles with more strategic importance. I never run a Vindicator or Land Raider without Daemonic Possession, for example, because the damage negation that the upgrade gives is absolutely priceless for strategic value.

DarkElf27 can attest to the fact that I used to be all about a smaller number of high-kit squads. Right now, you have a lot of squads without any particular purpose. Look into taking some Cult troops to give a little more of a leaned edge. Also, look into taking more heavy anti-armor. One Meltagun and two Lascannons are iffy. I'll post one of my 2500 lists in a little bit here so you can see what I field.

ok, i can see the ideas of the demon prince coming in, and i'd love to field one, but... i absolutely HATE metal models.. with a passion..

if i wanted some raptors however, i guess i could convert some space marine assault troops to chaos.

chaos squad 4 is kinda shambles i agree, so i have some spare heavy weapon troops so i can swap out that melta gun, or even swap for other squads.

as for my previous idea, converting normal space marine assault troops into raptors, would it work ?

ok cool, i just hate using bikers, they dont suit khorne much in my mind

but, they prefer to shoot like heck, instead of charge in like maniacs

raptors = jump out of a big ship and onto the enemy's heads

Fluff in the previous Chaos Codex was that they put spikes and blades on their bikes so that, when they slammed into their enemies, they would be able to do more damage. The same thing (shootiness) could be argued on the Raptors, saying that they jump around and keep in Rapid Fire range to pelt their enemies.

Try Khornite Bikers. You'll like them.

Van, with the current codex, EVERY unit except for Vehicles, Obliterators and Summoned Daemons can take an icon of the god of their choice.

Why do squads with the Mark of Khorne have a heavy bolter?
Give them Mark of Nurgle or Tzeentch.

Having the Mark of Khorne isn't going to make much of a difference against dedicated melee troops.
It is a waste of points giving a ranged squad a melee upgrade.
Nurgle works with Khorne quite often you know.