I haven't read all the posts, so I don't know if anyone had already said something similar, but I've always had in mind that a better version of ROTJ could feature some scenes in Coruscant, like in the original scripts. I think could be a great improvement something like this:

After Luke says Leia that have to try to save the father, we see the imperial shuttle take off from the forest moon; the scene immediately change to a view of coruscant from the orbit, in its night side with the shuttle approaching, then we see the shuttle pass between the skyscrapers of imperial city and then landing.

The scene switch to luke released to vader; beyond the windows we see the palaces of coruscant.

Similarly, during the duel between Luke and Vader, we see imperial city beyond the great window behind Palpatine (and all the scenes here could be settled in the imperial palace)

When the emperor show the space battle, obviously, it can't be outside the window, but showed via a hologram.

And when, finally, Luke leave the palace we see the shuttle going away from coruscant.

In this way the we could see some of the actions that will change the galaxy right in its core (the only time in the OT), could be a version nearest to the early draft then the final movie, and the actions of Luke could gain more importance because it's trough him that Vader really frees the galaxy! If the battle take place in the Death Star, well... even if Luke did fail, the destruction of Death Star did kill both Vader and the Emperor... and ends the Empire equally.