I'm kinda hoping that Trump fires Bill Barr. The firing would hamper the ability of the DOJ to ram through some new terrible policy in the waning days of the Trump Administration, and Barr has been so terrible I'm really not worried that any acting replacement AG can do any worse than what Barr would do in the next 48 days.
Yes, Barr getting fired could convince some people that Barr is not the horror that he actually is. But let's face it, the people around Trump are likely to suffer no long term consequences for working with him, even in the unlikely event that Trump's standing among his remaining supporters plummets once he leaves office. Because that is how this country works. Big wigs never suffer consequences for their actions in government. Look at what happened to Henry Kissinger. Hell, look at what happened to Olly North or Richard Nixon or John Yoo, or, well, think of anything awful that someone in power did during the pre-Trump period and then look to see what happened to them. People can do incredibly awful stuff, like bombings that burn babies, or propound naziesque legal theories that ignore large portions of the actual law to justify torture, and still land professorships and appointments without any apparent problem. Gina Haspel violated the law when she tortured detainees, then lied about it and destroyed evidence, and she still was confirmed as CIA Director, with a bunch of Democratic votes. I would love it if the excesses of Trump end the culture of impunity that pervades our treatment of monsters who formerly served in government, but I won't believe that unless I see it. Odds are everyone in Trump's orbit will land comfortable jobs and be treated as full members of polite society no matter what they have done in the last four years. That is true of Barr whether or not he is fired before the term ends.
But still, a firing would be fun on its own merits. Proving, once again, that there is no real benefit to ever work for Trump. No matter how much you pervert justice to help him our, he will turn on your in a second just for a single public comment that he doesn't like. If this is ever going to get better, everyone in Trump's orbit will have to learn that. Another example wouldn't hurt.