Don't forget paladins.
And I don't normally say "OP." At the most, just poorly-tuned or whatever. But paladins? Let's just say there is a reason that it seems like they make up the whole bracket... And why I've stopped going to the Gurubashi Arena with my guild
Atm, rogue and mages are still on the top, warrios became monsters and warlocks are pretty good now, I'm worried bout druids now though. Shamans are becoming good too. I hope paladins get a nerf too but I didnt see any in the beta yet.
And to answer the question about the resillience, so far, nothing goes down quickly and healers are becoming raid bosses atm. IT IS less bursty but if you want to balance this bracket out the healer should be reduced by A LOT.