Yeah, to be honest..I'm not really sure either. Honestly I have a cynical view of this to begin with...
Everyone knew this was coming. But I'm not sure Mueller can do anything to stop Whitaker from hamstringing him. He can just cut his budget, deny him subpoenas, etc. You probably won't hear Mueller publicly complain. I doubt he would even make copies of investigative records so that Whitaker cannot destroy them. That might be illegal in his mind.
Mueller isn't going to be some secret left wing superhero. He is a standard Republican. He believes in the rule of law, but he isn't going to break any DOJ rules or go out of his way to get Trump. He isn't going to hide records in a personal safe somewhere so that the Democrats can subpoena them or hold a press conference when Whitaker refuses indictments. I sure he isn't going to play politics at all.
Will Whitaker or his replacement do all that? Maybe. Maybe not. I doubt we'll find out until months or years later. And, to be honest. it's possible that Mueller was ever going to matter. In a normal functioning political system, he might have. But what should be clear to all now is that this is just a knife fight. From the way it looks like now...No GOP'er is going to protect Mueller, much less take action based on Mueller's report. I just don't think Mueller is going to indict the President. He will make a report, maybe. I'm going to prepare myself for that type of outcome now. I hope I'm wrong