Its not imbalanced, you just need to know that dmg and healing both give a 1:1 hate ratio.

So if your onion cut only does 200dmg(200hate) and a lancer or rng follows up with a 400dmg(400hate) move.. well you're fucked. Easiest way to catch up on hate since glad's cant out dmg most DoW is throw a cure/second wind to add more hate to yourself.

Also Accomplice(rk30 Pug) is amazing in terms of hate, just accomplice a healer that just drop'd a 500+ heal on you and you'll be just fine.