If we’re talking about getting really radical, I think the best option would be to cut it all into one movie:

First half is a shortened version of TFA. The Resistance is never referred to as such until the Republic gets destroyed, which doesn’t happen until the attack on Starkiller Base has already begun. That way it’s seen as more of a failure and the remaining Republic soldiers become a rebellion again. Luke being found is the midpoint.
Second half is TLJ but also cut down. Canto Bight is removed (Maybe add some TROS dialogue to imply that DJ is someone Poe used to work with, and that’s how they know him).
If possible, add the Rise of Skywalker’s final scene as an epilogue, with the two lightsabers getting buried replaced with the two halves of Anakin’s lightsaber.