Odd Rogue has gone missing. Shaman is gone since it only had one deck. Warlock is seeing more play since odd rogue isn't being played. It doesn't feel all that different yet. Lots of Hunter and lots of Priest. I've still been experimenting with Even Hunter.
Shame about Shaman but it's not unexpected. On the bright side at least they seem to be changing stuff more often. Now here's hoping the power level of the next few expansions stays relatively low so I can start to enjoy this game again.