+1 to nerf healers. The amount of self (and general) healing they can do is INSANE; 3v1 just to have a hope of taking down a good healer, really?

Healers should be SUPPORT, with their main strength being their ability to increase the strength and survivability of their allies (you know, that whole 'team-work' thing), not their ability to go frontline and laugh off almost anything short of 1-shot. And if they want healers to be able to survive burst damage, then surely that's what Tanks are for; {Cover} anyone?

PS. In terms of balance, and to stop everyone from simply playing a DPS, healers should still be powerful, with a Healer + DPS / Tank able to beat 2 DPS in most cases... however 2 DPS should be enough to out damage (over time) anything a healer can apply to themselves.