Well I didn't see it explictly on doubleofive's list, but one of the thing's that bothered me since my second viewing of ROTJ is the shot of the A-wing crashing into the Executor's bridge.
Please change that to look less like a burning car rammed through the set.
Can we get some more B-wing action in? I love the B-wing, and McQuarrie made a beautiful painting of some B-wings fleeing an exploding Star Destroyer.