it'd give you another jump, if you get hit after your second jump offstage with falcon, even if you di correctly and put you in the higher corners of the screen you're going to be coming downward regaurdless. its not like he has projectiles to help him in this situation, or some air stalling manuever. you just come back and aim for a sweetspot, and even still after he reaches a certain point in his up b, just speedhug the stage and he's a goner because he doesn't continually attack in his upb, its more like "from this moment to that moment" then there's a no moment.
edit: also it doesn't remove his recover weakness, it helps him. falcon is still combo'd easily and cg'd but he can combo well. I don't mind being cg'd since you can di from most characters away, but when you di away you are basically led offstage which would help, not eliminate the weakness.