Hi! I decided to stop lurking and join the discussion. I have read almost all of this thread (sad I know) and I would love to see some of these ideas become reality.
About the Ben/Luke conversation, someone suggested that it be cut altogether, and I think I have to agree. I don't mind Leia being a Skywalker - it's pretty much set in stone now, but it would be nice if Luke showed some of that famed Jedi insight and just knew that Leia was his sister.
So how about this: Luke training on Dagobah, Yoda dies, Luke being unsure, cut to Vader & DS, back to Luke preparing to leave, R2 beeps a message, show X-wings monitor with message from Leia or Threepio about the rescue, Luke heads to Tatooine. I think it would be easier to piece together.