Hello, in quite new here, but I'm reading the forum from a while, so I think I'm not saying something already said.
I've recently done a rough ROTJ fan edit, just not to be annoyed from the worst parts of it, and I'm quite happy about some solutions:
Jabba's palace:
Jedi Rocks is horrible, right. But was Lapti Nek so much better? Or we just usuallt preferred it because it was in the GOUT? I've tried to entirely cut it and IMHO it's working much better. After the short musical piece that is currently before Jedi Rock I've directly cut to Boushh arrival. No Jedi Rock/Lapti nek nor Oola death (do we really need all of that stuff?)
And again, I've adopted the same brilliant solution of the Spence Edit, cutting entirely the Rancor vs Luke sequence. I mean… he is a Jedi! Does he really need to use a bone (!!!) to avoid been eaten? Does he really need to throw a stone to push the button? Can't he use the Force?
Ewoks:
I hate them. :D But I've managed to get them acceptable. Ok the Leia-Wicket encounter. But I've deeply edited the scene when the other meet the ewoks: Chewie run but no dead animals hanging from the tree (is he suddenly out of his mind? :O ) Instead i cut to the ewoks emerging from the grass, pointing the weapons towards han and luke (when they're already standing, with the arms raised)
Then cut to the ewok going back to the village, the trumpets, the reunion with Leia, kiss and hugs (no Luke and Han tied for transport, no 3PO god of the ewoks. It works and it's not silly like in the George's version!!)
Then cut to 3PO telling their stories (the only ewok related scene I actually like), Luke-Leia dialogue, etc.
Obviosly I've then totally cut the silly ewok biker. And for the battle I've just showed them emerging from grass, throwing arrows to the imperials and then it's only rebel commando vs Empire. Except for some ewoks running and the one who die.
And finally, when Han set the trap to let the Imps exit the bunker, I've used the deleted footages from "rebel raid on the bunker" instead of showing the ewoks surround the imps. It's rough, but I've done it in less then 2 hours and it works! Some skilled editor could be able to reduce the ewoks that way cogently.
And finally, this is something i've not done because I've not the skills to do so, but speaking about Coruscant I think it's not impossible: get rid of the DS2, make Endor a moon of Coruscant. Ok, already said that. But… what if the bunker is generating a deflector shield that protect Coruscant itself? In this way the Endor scene could remain the same, with forest, ewoks, etc. Luke could go to surrender to vader on the moon. So, just a scene showing the shuttle go from Endor to Coruscant and have the Luke-Vader-Palpie scenes like already are but with the Coruscant skyline outside the windows.
And for "why the rebels should attack coruscant?" what if on the planet there was something in costruction? some deadly weapon? they just want to destroy it before it's complete and working. But it's obviuosly a trap setted by Palpie. Maybe using the Boba subplot, something more about the nature of the facilities and / or the weapons could be explained.
And finally, moving the action to coruscanto could be the starting point for the riots in the capital planet.