Name got a space in it now. People can just call me Bobby! (Or "that asshole" depending on whatever it is I just did.)
To answer the earlier questions (I was getting my Karin on in the SFV beta) Lucas was hands-off on the Empire production. He was staying at home and handling LFL business, such as it was, and Gary Kurtz was riding herd over the Empire production, with Kershner directing. Kurtz and Kershner had a TON of freedom. Lucas did write like 3 drafts of the script himself, with Kasdan pitching in another couple during and after, but once production actually started, he was hands off.
And then Kurtz couldn't get Kershner to deliver shots on time, and there were problems with the shoot overseas multiple times, and then the production got off-schedule by quite a bit, and the costs started mounting, and basically, it got so shitty at one point that Lucas, who was feeling really good about the financial independence afforded him by Star Wars' success, had to go back to 20th Century Fox and ask for more money, at which point they hammered him for it.
Which is why Kurtz didn't produce Jedi, Kazanjian did.
But it's hard to argue he hired Marquand to be a "hired gun" when the guy he was trying to get before that was fucking David Lynch - who is nobody's hired gun. Kazanjian was there to make sure production overruns didn't happen like they did on Empire (he was actually breathing down Kurtz's neck at the tail end of Empire, I believe? It's in the making of book, at any rate) but Marquand was given freedom to shoot what he wanted. It's just that once the footage was turned in, Lucas basically completely took over in post.