The Hayden idea makes sense on paper, but it was just unnecessary-- not to mention one of the most piss-poor hatchet jobs in all of Lucas tweakdom. Plus, the scene now makes less sense, since Shaw is still Anakin earlier in the movie. I assume the next Extra Special Ultimate Seriously It's the Last Time Edition will have Hayden in bad grayish recreation makeup as Vader sans helmet. It's also stupid because there's ol' Alec Guinness right next to him. The whole "redeemed" ghost thing is just another excuse for more changes.