While the skill surely needed the nerf, some other ones could be boosted to compensate. Anyway, I am hoping for similiar nerfs on spit, the towers of light, and that drain thingy on UB.
EDIT: To the whines about it being the only way - not it is not. The skill isn't removed. It is just being brought in line with the others. Erebus still has his super damaging minions, mist and bat swarm. He can still refill his hp bar, turning the scales dramatically in a second - only it will be easier to regain the upper hand.