Since there’s a little chat of an updated version lately, and I’ve just rewatched the trilogy a couple of times, some thoughts/wishes for consideration:

Back in the day there was some talk of different colour schemes for new planets on familiar biomes. For my money I’d be interested in a more red/purple Pasaana desert, and maybe a more autumnal or pastel Ajan Kloss.
We also talked about Rey’s crackly saber actually shorting out at some point - did anything get finished there?
Audio effects suggesting that force healing (“the power to prevent those we love from death”) is more of a darkside power could help explain why it’s not more commonly known or used.
I’d love to have Kylo tell Han’s ghost/vision/memory “I love you” before Han replies “I know”, preceding Kylo throwing away his saber. Poetry yes, but also a beautiful inversion of how it was first used.
As others have mentioned, it’d be nice to have C-3PO’s memory stay wiped.
A longshot that’s likely dependent on AI, but possibly the only opportunity to answer “a good question for another time” might be to have Lando talk to Maz during the finale celebrations, perhaps: “You did a great job taking care of that lightsaber I entrusted to you, Maz”.
To make the Dyad feel more deliberately planned, I’d be interested to see the image from TLJ of the black/white yinyang being from the stone pool in Luke’s temple flash up at a sensible point - “we’ve become a Dyad” perhaps?
The Jedi texts also provide an opportunity to imply in-universe existence of both Dyads (an image like the yinyang being?) and soul transferrence (though I appreciate that’s more of a Sith power), via a method similar to Neverargreat’s drawing of Rey’s island from TFA:Starlight
Might there be a way to improve on “I made Snoke”? Perhaps “I trained Snoke. A puppet designed to make you who I needed you to be.”?
I’d remove the Rey/Kylo kiss, and Lando’s weird scene with Jannah, but I’m sure you’ve got a good reason for keeping those.
It’d also be nice to, via VFX, see a bit more of the First Order merged with the Final Order - via the odd shot of First Order white stormtroopers, officers, and starships in appropriate shots.