This is part of their effort to give non-raiders something... raid-ish to do and, assuming they keep the boss counts of their original forms, definitely stands to give folks a decent little time sink when they pop. Also, Epics. Finally, a Maelstrom Crystal farm.
On a more personal note, this:
Fire Nova has been redesigned and decoupled from shaman Fire totems. Instead, it now pulses that same area-of-effect from each target that is afflicted by the shaman's own Flame Shock debuff. It now damages all enemies except the target hit by Flame Shock. The ability's cooldown has been reduced from 4 seconds, down from 10.makes me very happy inside.