According to the blues on the forums, although they are hiding it pretty well.
For the past weeks or so, people have been complaining about Warrior being overpowered in PvP. I wouldn’t know, I haven’t touched PvP yet this expansion, and not really planning to. The unbalance is a bit to strong at the moment, and random battlegrounds are a source of frustration if you ask me.
The nature of the changes are unknown, but rest assured Ghostcrawler and the development team will make sure that once again, Mages will be the dominant overpowered class.