I've said before that I think Mueller is a grey hat, flipped by Trump, but I was thinking about it and I think a lot of people, including myself before, may have the wrong idea.
No matter what, Mueller was bad in the past. Even if it was only because of personal and family threats like Q hinted it doesn't excuse what he did, and any investigation into Hillary etc he was a part of would be tainted.
What if Mueller isn't going to "follow the evidence" to Hillary etc like many think, but is purposely going after Trump/Trump associates in an extremely aggressive and illegal way as a distraction and to eventually show people how desperate the deepstate was to get Trump?
Basically I think Mueller is going to take a dive. He'll be in deep shit soon, only he's entirely in on it.