Lucas was going to make Leia not Rey the chosen one of the entire Saga. But he never made his sequel trilogy. I wonder if Leia taking over and ruling the Republic was in any way like the original idea for ROTJ where Leia became Queen of her people.
Still Luke running the Jedi religion and Leia running the government how does that work if the galaxy finds out Vader was their father. How do you prevent something like the first order from happening, which happened in Disney. or how does Luke prevent a student of his or several of them from going dark and upending everything.