Pretty much all of it. I don't feel like the deck is as cohesive as it should be; it comes nowhere near the cohesiveness of TMCS 1, for example.
Wild Growth doesn't contribute, but it's about the only turn 1 play that's usable. Most of my ideal spells are CMC 2 - which means that I need to stop Spell Snare, hence the Chalices, but at the same time, those are so meta'd (and stopped by Snare as well) they're probably not worth running.
Infestation/Endless is cute, but if it was good, then why isn't it being run in Standard? It needs it's own deck, more likely than not (and I hear Tombstone Stairwell works with it, too).
Ground Seal and Leyline are there for anti-Snapcaster/Surgical measures - which seems really silly, but at the same time, necessary. They also impact 'goyf and Scavenging, but meh.
Bottomless Pit is a house against spell-based control, if it ever resolves. But it also makes Infestation rather difficult to use.
Yavimaya Enchantress is an excellent alternate win, hampered only by the exposure to all non-red kill spells - in a deck with so few creatures they'll die if they're played.
Hence my statement of "the deck needs to be better."
Firstly, what I can think of:
-3 Ground Seal, +3 Sylvan Library
With no recursion effects, my main concern is Surgical, or not opening with Leyline. Every game I've tested with so far has opened with Leyline but one. Not honestly a big concern, and since multiple Leylines means an extra card, not as much of an issue as might normally be.
-4 Yavimaya Enchantress, +1 Library, +3 ???
Because above.