"This story, the one that we've seen, pays off in a much larger way because you get a sense it's the son vindicating the father. We are doing this in a context where we don't know where the father came from or what made him be what he is, or what needs to be vindicated. So we're just seeing the vindication take place without the act being seen." I think we've all felt this, on our first viewing of ROTJ after ROTS came out, how much more powerful Anakins redemption in when we've seen what he was, and what he's done. But it's great to hear the creator himself, long before the prequels were being made, recognize the need for that emotional context.