I don't think Bannon exiting really means anything great or is a sign of improvement, but it is more chaos and proof that Trump has no leadership ability. At most Bannon was just adept at feeding Trump the hateful stuff he wanted to hear already. I told my wife last night that I thought Bannon was trying to get fired, because he had to know that talking to the press and getting attention is the surest way to get Trump to throw you out. Havin an SNL parody of you is the next surest indicator. I'm hoping that Kelly quits, before Trump eventually talks shit about him to everyone for trying to make him say and do things he doesn't want to.
I know a lot of people talk about impeachment, but I honestly do not want that. It plays too much into the victim/witch hunt narrative he and his die hard supporters love so much. I'd rather him keep fucking up and acting like a maniac bigot, until everyone he's hired is either too repulsed to stick around or realizes that there's no future or politcal currency left in supporting him. So he's left alone in a barely staffed white house, with people who can barely figure out how to turn the lights on, tweeting profane insults to anyone who @'s him all day, then eventually shit fits out and quits via Tweet. THEN arrest him and put through the ringer for every single fucking crime they can nail him on.
He'll still claim it's a witch hunt and he was amazing, but no one would let him do all the great things he wanted to. Just the only people who will believe him are the most deluded lunatics at that point, because he'll have pissed off, lied to and failed every person with a shred of human decency or moral standard.