The Arms mastery, Strikes of Opportunity, really, really, REALLY, needs an animation change. I would suggest that it be changed to the old Sword Specialization animation (double slash), as the mastery is basically a clone of the old Sword Spec.

It is incredibly silly how stupid it looks to be constantly hopping (male human) between MS, OP, HS, Strikes of Opp., etc., especially when you get the proc multiples times while dpsing. My character will literally hop for sometimes 10 seconds straight.

I would also bring up the attack sound change, but honestly, I think thats just a bug, and we will soon once again have our "blood gushing" sound effect back.