DF Shadow said:

But if Hayden were to be left in there......

He dies as an older man, not his younger self. It makes no sense for the ghost to come back as his younger self. It was a cheap gag thrown in by Lucas to try and tie the OT in with the prequels. Instead of actually showing some effort and making the new "films" work with the pre-existing material he goes back and tries to make the films that have existed for 30 years work better with the new ones he's making. Its backa$$wards and its wrong