Another point about the RotJ battle:

We all have problems with the ewoks, and how a whole batallion of the so called elite troops of the emperor simply break rank and run when attacked by rocks and bows.

I am watching it at the moment and I was struck with an idea: Chewbacca takes over an at-st in the middle of the battle. What if that scene is placed near the beginning? The scene of them taking it is quite seperate from other events, so there would be no chronological issue there.

It would explain the way the troops just run off like that. They are taking cover before it fires at them.

And I also support the idea of the Death Star wreck. I always thought that the complete desintegration of the original ds was kinda overdone anyhow.