I'd really like to see the rest of the rebels come closer to the forground in ROTJ. The group that goes to Endor are always somewhere else or simply in the background with no dialoge!
There are a couple of times when it would actually work to give them some throw away lines. Example: when Han says "Take the squad ahead. We'll meet..." the rebel nods and motions the squad onward. You can't see his mouth so this is the perfect time to have him say something like "Yes General! Let's move out men!"
Another idea I've had:
http://www.youtube.com/watch?v=n_P-YYKA5a0
I'd like some perspective on this...maybe we can make something better...you'll have to forgive my terrible voice in the clip! :)