I think I had a couple of ideas that could fix the Sequel Trilogy. However, they can’t be implemented right now, because they are very radical ideas and we still don’t have the means to implement them. Therefore, we should wait for the technology to advance enough as to allow us to create entire new scenes, with a good mix of AI and CGI.

My ideas are:

Modifying the reason that brought Luke to go into exile in The Last Jedi. Instead of going into exile to hide from his responsibilities, Luke went into exile to meditate, understand what he did wrong with Kylo and his New Jedi Order, and study a way to defeat the First Order. When Rey arrives, he realizes that the time has come, so he tells Rey what he did wrong, what the Jedi Order from the Prequels did wrong, and tells her that the Jedi need to be reformed (exactly in the same way Luke reformed the Jedi Order in Legends by abolishing some of the old rules). Then, he dies at the end of The Last Jedi by sacrificing himself to allow the Resistance to escape from Crait.
In The Rise of Skywalker, Palpatine doesn’t come back. Instead, it is Snoke the one who comes back. After all, if Palpatine can come back, why can’t Snoke? So, everything from The Rise of Skywalker would be very similar to the original version of the movie, but with resurrected Snoke instead of resurrected Palpatine. Snoke pretends to want to give Kylo another chance to rule the Galaxy with him, and pushes him to bring Rey before him. However, when she arrives he reveals that she was his real target for the entire movie, because she is much more powerful than Kylo ever was, and Snoke wants her to become his new apprentice. He reveals that Rey is Palpatine’s granddaughter, and that this is the reason for her abnormous power. Then, he also reveals that he has always been Vitiate all along, and has waited in hiding since the times of the Old Republic. He was waiting for the right time to come and reclaim the Galaxy for himself.
In the final confrontation with resurrected Snoke/Vitiate, the Force ghosts of Anakin, Luke, Leia, Obi-Wan, Yoda and Qui-Gon appear. Anakin’s ghost is the one who actually defeats Snoke/Vitiate, thus ending the Sith for good, and confirming that he was indeed the Chosen One who was destined to destroy the Sith once and for all.
At the end of The Rise of Skywalker, both Rey and a redeemed Ben Solo survive. We have a small time jump of some years, and the last thing we see is the two of them standing before a class of students in the New Jedi Temple on Naboo, telling them about the adventures of Luke and Anakin Skywalker, and teaching them the importance of redemption.

What do you think?