I agree that operatives healers are far stronger than mercs and sorc healers, but I do not think nerfing then is the way to go. The hps they put out is needed to counter the dps the enemy deals. Last night I had several matches against teams with a 2 marauder 1 dps geared vanguard setup, together their dps put out about 2700 dps every game. If an operative wouldn't be able to put out 2500 hps to counter that, those offensive specs would rule the arenas. Therefore I think it is better to buff sages and merc rather than nerf operatives.