Cut to ROTJ a mere year after. Suddenly, the rebel alliance is strong again with a large fleet and new allies and leaders. What?!
I would change the crawl of ROTJ to be more desperate on the part of the rebels. Make it sound like the rebels are still in tatters from ESB and so they launch a, some would say foolish, risky assault into the heart of the empire.
It would raise the stakes and make the rebels appear more desperate for a huge victory that could end the war.
Of course, the Emperor would know about all this and would let them come. >
