Wow, shoot me for saying it, but can't people wait till Ady releases the finished movie before they start dissecting it. It's a bit unfair to start picking at it when you're not viewing it as a whole.
To Angel's point about cleaning up the officer's holograms so they look cleaner - aren't they distorted because of the asteroid field? And Vader has them move the Executor clear of the field so he can get a clear signal to the Emperor. I like the distortion on the officers, it works exactly how it's supposed to.