My main edit would be to cut the bit where Kylo takes his helmet off while torturing Rey. So the reveal that he is just a twisted young man and not in need of the mask like the grandfather he hero worships would be made just before Han’s death.

I would have Artoo power up in the presence of the lightsaber.

In the theatrical cut he just waits until the end of the film… for reasons.
He should have some sort of trigger to get him awaken.

I would have had Rey find the sword in a wrecked Star Destroyer, it is being shipped to Palpatine as a trophy when the ship gets caught up in the battle. Maybe it had a secret that Anakin had discovered or Ben had hidden for Luke to find like in the early script of ESB.

I would either have Jaku Tatooine because it’s just too similar or have it what Endor became after all that space junk fell from the sky. It’s remamed Jaku because of the price of victory being so bitter for both sides.

The other flaws in the film are impossible to fix (specifically the cynical reuse of plot points from ANH, the criminal under use of some characters). The performances, direction and design of the film are spot on.