One idea I’ve been thinking about for the past few days is to push the “Luke’s Moment” deleted scene all the way to the point where Rey leaves Ach-Tu. I think that a lot of the issue people took with Luke’s characterization in TLJ was due to how bitter and dismissive he seemed. Obviously he ends up being the Luke Skywalker everybody loves, but we never really see that transition take place. He’s constantly bitter for 90 minutes, has the scene with Yoda, and then is suddenly the hero everybody has dreamt of. But if you move him having a moment in his hut to the point where Rey confronts him about how he turned Ben to the dark side, it’s a lot more meaningful.
I think that the intent of the deleted scene was to show his reaction to Han’s death, but it doesn’t come off that way. The sequence of events is “Where’s Han” < Kylo talking to Snoke < Kylo breaking his mask in the elevator < Rey telling Luke he needs to return < Luke Has A Moment. It doesn’t really fit. But if you have that deleted scene right after Luke talks about how he nearly killed Ben Solo, it takes on an entirely new meaning. You’d have to cut his brief fight with Rey, so that he seems much more defeated than furious, as well a few of his earlier lines. Some other cuts would be needed to accommodate for this of course, but I think that it could work.
It would also get rid of cutting to Leia in hyperspace for one shot only, and then immediately back to Rey and Luke, and there seems to be no clear consensus on how to approach this transition. With the change I’m thinking of, the sequence of events would be:
Luke tells Rey the truth and Rey leaves < Finn and Rose in Hyperspace with DJ < Poe finding out about Holdo’s plan < Rey being dropped off at Snoke’s Star Destroyer < Luke has a moment < Rey and Kylo in the elevator < Some antics while sneaking around Snoke’s ship < Luke communicating with Leia via The Force < Poe’s Mutiny. Then everything else is in the same order as the theatrical cut until Kylo declares himself Supreme Leader. After that moment we get Luke and Yoda’s scene. Obviously these are all just ideas floating around my head, and I’m sure once you actually sit down to edit the film, things will be different, but the general idea still stands.