I just think that Spielberg didn't want to do it (because it was SW, and that's George's and the fact that he was doing films back to back almost) and then there were the unions etc. It would have been similar to the way Jedi turned out anyway. He works best when under the gun and hasn't made anything really worthwhile since Empire of the Sun.

Lucas would have most likely acted the way he did on Raiders, as the producer.

Ford really has nothing to do in ROTJ and thus there really is little to go on. He had just come off Blade Runner and must have realized how little there was for him to do compared to Deckard's complexities. Everything ends to cleanly for my liking. ROTJ is just the nice little wrapped package. It's not at all bad, just disappointing when you really think about it.

And Han does come off as too soft. I guess the carbonite adds weight, age, and bitchiness.