This is the new reality for warriors. I've played over 1000 arena's on beta and they do just fine at 100. Are they the absurd wrecking-crew of a class they were for amost of MoP? No, but if you care about diversity and true competition that should be good news to you. You can separate yourself from everyone else much easier if you are in fact good now as a warrior. In MoP, there were really only 2 truly skilled warriors. Cara and Trillbartom. :0
As someone who cares about the overall health of PvP, the state warriors are in, at 100, is good news for us all. As I said, there are obvious offenders who will have to be toned down (ret, feral, dk) if Blizzard has any plans of balance this upcoming season, but IMHO, as far as balance goes, PvP feels good at 100. Slower, but good.
Addendum: I realize there wasn't an over abundance of skilled players on beta but one can still get a feel for the ebb and flow of arena. I will also concede that MoP was dominated by casters mostly but as far as melee went, warrior was really the best class for most of MoP (rogues had their place but in specific comps).
cool story fanboy -.-