The 1.7 patch has brought a lot of issues out in the open -- most notably resists. My level 56 Frostbolt spell now behaves as if it was a level 56 casting it, not my 60 Mage. So, resists in PvP and PvE are noticeably higher for all casters who aren't using a level 60 spell for damage (Mages' happens to be Fireball, useless in most raiding content.)
On the bright side, though, we got Thunderfury last night and to the best of my knowledge were the first Horde-PvP guild to do so.
I dueled Gauge right after he got it (in 1h+shield mode) and was raped by the procs.
I feel sorry for anyone who encounters him, the proc is insane. Pardon the QVC-image, I don't have a screenshot of just Gauge online atm so I yoinked it from our news.