In my humble opinion if control is a problem, there are better options to deal with counterspells than Vexing Shusher - as in the end its a "dead card" in the sense that it does nothing beside preventing counters.

Cards like Mistcutter Hydra, Skylasher, Isao, Enlightened Bushi, Prowling Serpopard & Thrun, the Last Troll all have built useful bodies, and built in hexproof without any additional mana investment.

ok, first of all great deck. I made a deck very similar to this about a year ago. here are some suggestions:

in -> 4 Elvish Mystic

out -> Kalonian Tusker, 2 Wasteland Viper

in -> Reverent Hunter

out -> I don't know exactly. maybe Blossoming Defense or Vines of Vastwood.

Reverent Hunter is incredible in a mono green devotion deck which brings me to my next card.Surrak, the Hunt Caller. I would definitely run at least 2 of this if not 4. it is in essence a 4 mana 5/4 haste and if your opponent isn't dead already. your next Reverent Hunter has haste. (3 mana 9/9 haste is pretty good on turn 4) also I like to run Vorapede just because if the deck eventually runs out of steam you still have a trick up your sleeve. now in addition Khalni Hydra seems good although it has not fit the flow of my deck it min fit yours better. also I am exited for Ghalta, Primal Hunger and you might consider Rhonas's Last Stand it seems pretty good. but most important of these suggestions are Elvish Mystic and Surrak, the Hunt Caller. I hope these have been of help and also I was using Bond Beetle to activate Avatar of the Resolute but Experiment One is definitely better. also you may consider Harmonize

oh also I think Treetop Village is unnecessary and will slow the deck down.

Barrons_Jericho I agree with Xica about Vexing Shusher, not good enought.

jk77 thank you for help but this is not a mono green devotion deck so I don't think cards you mentioned will fit in this deck.

well it is mono green and you are likely to have a lot of green devotion. I still recommend Surrak, the Hunt Caller anyways

So I'm thinking of doing a variation of this deck but with Exemplar of Strength in conjunction with Young Wolf and Strangleroot Geist. Do you have any thoughts on how that might perform?