I loved Fury PvP in Cata, mostly played unrated and very low rated PvP at the time, though. I've PvP'd in MoP as Prot and Arms mainly because I got much more into rated PvP this xpac and there's always room for a flag carrier in oQueue RBGs and there's always someone looking for a tier 1 Arms for low-mid MMR PUG 2s and 3s. I would love to see Fury become a more desired spec in rated PvP, it's where I got my start as Warrior and the spec has a special place in my heart.