What can be done from this brilliant list of ideas.
I already suggested a way for Leia to rush into saving Han after becoming impatient with Luke finishing his training on Dagobah (as in the fan-o-matic), so that part can be adapted.
Chewie throwing a guard into the Sarlacc might be doable by taking footage from the Endor battle and replacing a stormy for a skiff guard.
Yoda's new line could be added into the beginning of a fan-o-matic style cut or where it is in it's current form (suggesting he has been going back and forth but it might be a bit more vague that way).
It may be possible to replace conference members with a more diverse band (I've already voiced my dislike of the set as it currently exists).
Dropping the other generals in may be possible.
Alderaanians are already implied with the lone blockade runner but more could be added.
Making the Tydirium an Imperial transport rather than a shuttle would make more room for troops and equipment.
Chewie on the bike must be doable with a good model (but it might be difficult getting him to sneak past the troops).
I already did a mockup of the dish on a mountain ridge (all be it on the other side).
The blowdarts and Ewok deaths can be adapted from elements from the Ewok movies (there have already been posts about how to make their culture more complex and convincing as fighters).
More ships are certainly doable going by what Ady has in mind.
More pilots might be doable too (there are plenty of people with spot on costumes who would love to be in a cut of one of the films).
And I love your idea of the audience jumping to hyperspace at the end (nice touch).
So there's plenty that can be done there.