I've just been watching the GOUT ESB and there's an error which I'm pretty sure made it into the SE and which (at least according to GM's suggestions thread) hasn't yet been mentioned. The first shot after the walker blows up the power generator has Han and Leia running in a corridor inside the base, and there's a shining lamp on the wall. Perhaps the generator is supposed to be a shield generator, but it's referred to as a power generator at least most of the time in the film, and I quite like the idea of seeing this lamp flicker and die and then having all the shots in the base darkened. I realise this would take a lot of painting out of lights in the subsequent minute or so, so an alternative might be to have the lamp flicker off and then come on dimmer, as an emergency generator kicks in.

Another request is when the Star Destroyers collide, to have more camera shake and perhaps some visual effects in the window to show them actually colliding, even if it's just flashes from unseen explosions (which would probably be more effective than directly seeing them).