C3PX said:
The only Anakin Luke ever met was the Sebastian Shaw Anakin, how would Luke even recongnize Hayden as his father's ghost? It just doesn't make any sense to make this change. It is just a lousy attempt to tie the two trilogies together, and to make it stand that the series is really the Tradgedy of Anakin Skywalker.

It's sort of an attempt to make it impossible to see the OT without seeing the PT, because if you've only seen the OT you wouldn't have a clue who Hayden was. It does shove the whole Tragedy of Anakin bull down our throats.