I still maintain that Luke didn’t actually save the galaxy - a fact that renders his entire ‘new hope’ journey somewhat meaningless to me.
Luke was the only one who could get through to Vader. Vader was the only one who could destroy the Emperor.
Without Luke, there’s no hope. He saved the galaxy by redeeming his father. (or, by Returning the Jedi, if you will)
I also hate the sister thing. Luke should have gone off alone in search of “The Other” at the end.