One obvious change across the whole nine part saga would be to not name the children in part 3 so Rey could be The Other kept on ice and placed on Jakku by the Church of the Force to make another Anakin. So their Palpatine clone could turn either Ben Solo or Rey Skywalker to the dark and fight the other. Surely a church of the Force would need the dark and the light. In a world with a Jedi Master like Luke they would need a sudo Palpatine. Snoke can just be edited away. That way Leia is never Luke’s sister.