Something went wrong with Mel around the time of Blazing Saddles (which is very over-rated) if you look at The Producers, Young Frankenstein and to a lesser extent Silent Movie and High Anxiety, it's hard to believe that the same guy ended up doing Life Stinks, Men In Tights and that Dracula spoof which was so bad I can't even be bothered to remember the title.
Everything about Young Frankenstein just works and it's reverentially close to it's source material in a way that Spaceballs really couldn't be (Gene Wilder and Marty Feldman aren't in it either). Mel understood the films he was referencing in Young Frankenstein but Spaceballs seems to be a spoof made by someone who doesn't really get the films he is sending up.
As for the ROTJ Executor Bridge, I think the main problem is that they had taken down and got rid of the antechambers off the corridor if those could be reinstated using footage from ESB the shield monitor console could be moved to there and we could avoid having a computer terminal in the middle of a walkway.
Move the scene to this location :
