I don't think Mission Space is terrible, it was cool for what it was. It wasn't great or anything but I liked it. I did the "more intense" version and it only disappointed me because I expected something more crazy, I don't understand how that ride messes people up. I also don't think they'd do the falcon ride like that, if they did, I'd be very disappointing.
As for the stormtrooper dark ride, as cool as that sounds, no way it would be the size of Toontown, no way in this current age of Disneyland would they spend that much space on one ride, also what would they do for it to be that long, stormtroopers never did much then hit their heads on walls or give away the shield to the base when you were sold on being a badass character in marketing