Nerf? etc.
Nerf one class just because they perform a little better in PvE is a retard way to do in a game.

You can try looking at 1st world Lich King by Paragon, all raid were constantly moving behind the boss, and yet they were fine.

The problem doesn't come from the class, it come from the poor boss design SE have made and their ridiculous server. As of now, bosses in this game are hugely in rDPS favor.