Adding or not adding a senate scene would also depend on how you view this edit, whether it's intended as a sequel to the prequel (if you get my meaning) or if it should stand alone as it first did, but with added effects and such. If it's a stand alone kind of thing, I'm not sure it'd be a good idea to jump to a planet we've never seen into a location we have no context for, so a character we've never met can tell a bunch of people they're not needed anymore only to leave the scene right after he does so and not see anyone from it for the rest of the movie.