The whole moral of the Saga doesn't change because Hayden represents Anakin at the end of Episode VI. It's still there. It's like having a dual personality, if you really want to get simple with it.
I believe the man Padme loved died in Episode III. I believe the man that destroyed the Emperor is the man Luke sees (when he takes of the helmet) but also the man as he once was....
Because the Jedi are the only ones who know of this power, isn't it possible to accept Anakin AS HE WAS when he was a Jedi and not when he was Sith? It's as if the Jedi and the Force granted Anakin special circumstances. That still doesn't change the fact that Anakin paid dearly for his mistakes in the past. He's not off the hook by any means...but he does stop the horror that he started and for that, he gets to become as he WAS...not what he had become....