Seb Shaw doesn't look that much different from a middle aged Hayden now that the eye colour has changed, (the only aspect of the make-up that does need a fix is the top of the head which is obviously built up and looks a little silly).
I wasn't suggesting reshooting all of Hayden's scenes (as much as I would love to) but replacing his voice which is a difficult task but if it could be pulled off would fix so much of what is wrong about the prequels (namely Hayden's often lamentably bad performance).
Hell, if I could I'd do the same for Lloyd too.
A good actor can give even the wonkiest script the necessary gravitas to propel a story (great actors like Derek Jacobi could turn the phone book into an emotional roller coaster ride).
The irony is that the much touted (and I'm not sure how apocryphal the story is) first choice of Leonardo DiCaprio looks more like a half way between Shaw and Lloyd than Hayden does and the must have been no shortage of DiCaprio lookalike, unknown actors with talent who could have done the job better. Why they went for that plank is beyond me (not that I'm convinced that DiCaprio would have done much better either with Lucas pulling the strings and if the reports of DiCaprio turning the script down are true good on him, I'm not a big fan of his work but the script for AOTC reads like bad fan fiction). I suspect they only picked Lloyd because he had a DiCaprio shaped head, something Hayden clearly does not (going by the screen tests for TPM Lloyd was not the best actor of the bunch).
Though that is really an object of discussion for another place.
If Shaw stays (my prefered choice), his ghost should stay too, middle aged Anakin is the only father Luke can relate to and the only one he would want to see.
I can understand changing his clothes to match those he wore in pre-Sith life but the head swap is a bizarre choice aimed largely at people too stupid to follow the story and work out that the old guy in the suit is the same character as the younger guy in the same suit three films back.