Did not have to reverse The Last Jedi at all. I, because I'm a writer and I can string two scenes together, wrote two additional scenes which could have been added to Episode 9' beginning and course corrected the whole damned mess. Luke having Force Teleported, instead of dying (it's a real thing in the mythos of Star Wars, look it up) to the Falcon as they left the conflict behind. Anyone with micron of talent could have fixed it in two minutes at the very most...