Now it also decreases shields also. I wouldn't be surprised if decreasing all healing is intended now that you can benefit from 50% healing at least.
I always hated the ability anyway since it takes such a huge chunk of heal, more than any ability that would take stamina to restore health and magicka(dark conversion) and made it nearly impossible to heal for solo play.

I think equilibrium needs another redesign anyway before most people will even look at it.