The three obvious solutions are:
1. Complete re-skin of the land to Return of the Jedi. All the OT main characters are still alive and you get Ewoks, Jabba, Vader, etc. You can still have the Mandalorian and Grogu and nobody is going to complain.
2. Have the timeline shift throughout the park day. Early in the morning you get walkaround characters from the prequel trilogy. In the afternoon you get original trilogy characters. In the evening you get characters from the sequel trilogy.
3. Different days mean different walkaround characters. Monday and Tuesday are prequels; Wednesday and Thursday are sequels; Friday, Saturday and Sunday are the original trilogy characters.
Personally, I would pick option #1, but I'm 50 years old. Regardless, any of these three options are better than what we currently have.