This might be my conservativeness talking, but I'm not sure on that last one. Its easy to imagine better, but making it actually manifest is far tricker, and how good is actually achievable is often much lower than we think.
If Trump steps aside on his own accord, it might go fine. If he gets stabbed in the back and overthrown, that demoralizes and party and people likely leave en mass. The Republicans have a huge loyalty problem, and such blatant disloyalty would greatly exasperate those.
I personally if the maneuvers necessary to get rid of Trump were carried out would become greatly distrustful of the GOP and have deep suspicions that the RINO's have just taken over. Especially if Trump's removed to put anyone besides DeSantis in.
If Trump gets removed to make way for Mike Pence or because it's Jeb's turn, I think that would be way, way worse than Trump running in 2024. He might lose, but he might actually win, and at least it completes his narrative of trying till the end.
If he's kept from running through GOP machinations, I think that will sour a lot of people even against DeSantis, and if its anyone but DeSantis, a Republican victory feels impossible. I'm not sure I would still vote Republican after that. I guess the constitutional party still exists somewhere? Definitely not voting Libertarian at this point.
Like I said, could be the conservatism, but the risks seem clearer than the upside.