I've been watching the class changes in the 4.3 PTR, and I'm less than thrilled. The three class/specs that I play --Ret Pally, Frost Mage, and Affliction Warlock-- have either got a big ol' batch of nothing (Frost and Aff) or a slight mix of buffs and nerfs, ending up in an overall nerf (Ret). (Druids have been hit by a nerf bat too, now that I think about it.)
What's enjoying the spotlight these days? Holy Spec Pallys, for one. Fire Mages, for another. Destro Warlocks. Warriors. Shamans. Holy and Disco Priests. Hunters and DKs got a smattering of love, too.
It's still way early, but it's not looking so good at the moment.
Well, at least Rogues don't have anything new.
EtA: OH! The most important thing (at least for me) in the PTR is that the Alterac Blitz achievement will no longer be needed to get the Master of Alterac Valley meta-achievement. I just don't see how one team can get the Blitz if you've got two groups of 40, especially since it takes a couple of minutes to go from one end of the BG to the other.