Above you quoted the Annotated Screenplays. I wish to God I could find that quote of Lucas back in early 80's about what he would do with the "backstory" if he ever made it because he essentially said he was going this route...a route that many of you don't like.
I'm not saying you're wrong with that quote above, but the quote I've read about "if he made the backstory" is even more telling and why I like the Prequels.