It's the combo of the hybrid healing nerf and the -30% to all healers... makes the heals pretty worthless for my toons. They can still survive for a decent amount of time, probably mostly due to the grounding and capacitor totems, but it's not like it was before where a full round of maelstrom stacked heals would get any toon back to full. It seems like it's only about 40% of a toons health, which isn't a lot.