Does Chandra, Pyromaster really fit in this deck. Her +1 is decent becasue of disabling big blockers, her 0 could be an extra draw I guess, her ultimate is basically useless in this deck because you only have 6 inst/sorc cards. You could probably replace her with Xenagos, The Reveler for some extra ramp, and creature/land fetch with his ultimate. Maybe even Garruk, Caller of Beasts for that massive creature fetch. And with his -3 you can even slap down an extra green fattie. IMO, GCR's blood rush is just too huge to not run 3 or 4 of him. I used to run 2 but I found I was never drawing him when I needed him so now I run 4 in my Gruul ramp deck. Since Theros came out, I started running Satyr Hedonist for red ramp, because then I can put down a Stormbreath Dragon on turn 3, which can be pretty huge. Since you're running all these fatties, you could even try running Gyre Sage over Sylvan Caryatid because of the evolve getting you more than the one mana that you get from the Caryatid, although it's either mana source opposed to only green from the Sage which could help in a pinch.

All in all though, solid deck. +1