I wonder why blizzard gave feral druids the 5% crit buff and the mangle debuff where as for warriors you need 2 to get all those buffs. I think, to be honest, they should have made both specs give the trauma debuff and the 5% crit and re-balance arms to include that 5% crit, that way dpsing on a warrior will be a matter of preference.
I may give this a try maybe when I get ahold of a polearm, the one from general dropped yesterday but our hunter got it. I'd also probably need to get a armor pen trinket, yes still no grim toll
Maybe after having all that it may be better,