Eh. I think there's still some bits left with Corpse Witch. For one thing, I think a lot of us want to see something happen to her. Not torture, but some sort of punishment incoming.
For another, I think most of us want to see that the other fight club robots are going to be all right. If Corpse Witch is just left where she is, then a lot of other robots are going to suffer for it. Bubbles is the person we care most about here, but I don't think we'd be really happy knowing Jeremy, say, was still stuck working for her. Even if there aren't that many robots directly working for her, there are a lot who depend on her, and are therefore likely targets of abuse. I don't see Jeph just leaving that hanging.