“The part that I had never really developed is the death of Luke and Leia’s mother. I had a back story for her in earlier drafts, but it basically didn’t survive. When I got to JEDI, I wanted one of the kids to have some kind of memory of her because she will be a key figure in the new episodes I’m writing.”
–George Lucas, Star Wars-The Return Of The Jedi: Annotated Screenplay, 1997
This quote you used for your argument invalidates your view on this whole matter about force visions, etc. His original plan when writing ROTJ was to have Leia spend time with mama Skywalker to have good memories. But WHILE HE IS WRITING THE PREQUELS KNOWING HIS ORIGINAL PLAN ABOUT LEIA AND PADME, he kills off Padma at child birth.
That’s a high level of bad writing in my book.