The biggest problem I see here is that you're moving away from an aggro build with the new inclusions.
For instance, Scavenging Ooze is a great card, although hardly one I would consider being aggro. The idea behind aggro is to be dropping threats every turn, with all your mana going to adding to the board - not paying more and more into pumping your existing threats. Ooze is great, but in a pure aggro build, it's little more than a Grizzly Bears.
I don't know that I'm sold on Xenagos, the Reveler in aggro. Sure, he combos nicely with Mistcutter Hydra and that could get out of hand rather quickly, but in reality, he's not an immediate threat on the board when he hits - most often you'll find yourself just pumping out 2/2s (not a total waste, but hardly what you want to be doing with your 4-drop here). The ramp he provides will be nice from time to time, but in reality, four is the top of your curve, so what are you ramping into? Or better yet, if you have the four creatures on the field to make him into the BTE of planeswalkers, aren't you already winning? Simply put, I can see where Purphoros, God of the Forge or even Fanatic of Mogis are going to be better finishers in an aggro build.
A few other suggestions...
I would lower the count of Reckoners to two as RRR isn't the easiest thing in the world to cast when you're half torn between R and G. They're great against the mirror, but that's what the SB is for.
Firefist Striker isn't included here because? You're attacking every turn... his battalion might as well be removal a lot of the time.
Reverent Hunter might be worth looking into (they're certainly cheap enough to buy a set to try out). It is not beyond the realm of possibility that you could BTE - into him on T3 and have him be a 4/4. Nevermind if you were to put in some Dryad Militants or Experiment Ones to provide added green devotion on T1.