I love how just the visual of a beard or facial hair can connotate a long passage of time.

I still think that you could just cut out Vader's arrival in the beginning of JEDI and just start with C3P0 and R2 walking up to Jabba's palace, and leave the reveal of the Death Star 2 when the Emperor arrives. Vader's arrival to the DS2 adds nothing and is redundant, as we're reintroduced to the DS2 with the Emperor.

Now what you do with the rest of the editing is the next question. I think THE WAR OF THE STARS has some really interesting ideas throughout (one way one could include the "raid on the bunker" scene is have it on a screen with the Emperor, Vader and/or Luke watching - thus a way to deal with the limited resolution as well as show Luke/the audience that the Emperor is not just one step ahead of the rebels, but is literally watching their every move).

I also think that when Luke "freaks out" after Vader's taunt to tempt his sister (try saying that three times fast) one should add pieces of the surrounding area flying/pummeling into Vader (which would be a nice turn on how Luke was handled in the Bespin fight) and/or lightning from the electronics zapping Vader to show just how much power Luke has, as well as explain why Vader is defeated so easily. Even regardless of adding any of that, I would at least edit OUT Vader "taking a knee" and purposefully falling down and exposing his hand to be wacked off.