Stacking Full crit you should be at 35% unbuffed crit. Furys burst is alot better then arms for sure and the burst outside of cds is amazing, I have hit 160-185k Rbs on casters (Mages take the 185k hits more then other casters) with 50+k Heroic strikes, Add in another 60+k from auto hits connecting the same time RB and Heroic strike hit and you have knocked out close to half their hp in 1 gcd.
I have been playing fury on Ptr and its damage is definitely good. Its sustained is lower then arms still but the random Rb burst crits make up for it imo. I have seen 100k Rbs without cds popped. With mage buffs Fury is sitting at 40% crit, add in a class that can give the mastery buff and Fury is extremely Deadly.
My profs on the ptr are BS+JC and I have full crit gems minus the chest and helm socket bonuses and I believe I am sitting just below 33% crit. And I also have crit off pieces. Not exactly sure what I'm missing to make up for the 2% crit. Just wondering what I might be missing.