I've been listening to the ROTJ radio version to see if there is anything that can be pinched from there.
The acting is rather variable, sadly not a patch on the other two but there is one added plotline that could add a bit of impact to the movie.
Vader is fully aware that Luke and/or his friends would attempt to rescue Han so they have Imperial ships observing Tatooine for any sign of a rescue.
To give cover for the Falcon and Luke's escape Artoo patched into Jabba's computer network to send a warning to his employees that the Empire are clamping down and have death warrants causing a mass exodus of Bounty Hunters and the like (the bounty hunters escaping would be difficult to achieve without new live action footage but an Imperial blockade makes immediate plot sense and wouldn't need much in the way of exposition).
It would give Luke's return to Tatooine a bit of a punch if he had to shoot his way in and out, as I said earlier it seems a shame that we don't see Luke the pilot in the final episode, just Luke the knight.
It would underline how desperate Vader is to get at Luke before Palpatine does.