I will agree with this thread. I am currently playing a 50 Sorcerer heal spec. It is impossible for me to heal through the damage they can output solo. They wont even interrupt my casts, simply stun and power through all my bubbles and heals. I don't think that healers should be immortal at all, but at least give me a fighting chance.
I may be able to get away with a electrocute, force speed away, but if those arent up, and I try to stand my ground, I will die at the hands of an operative/scoundrel. From my point of view, which is limited to this class atm, they either need to tone down the damage, or give a slight buff to healers. I should be able to keep up single targets against other single targets with no cc or interupts on me. Just sayin.