I think most holes will be filled, there will be some left the more we analize them. GreedoOfRhodes mentioned a 3 minute scene on Tatooine. I may be wrong but isn't it possible the scene could be longer, if they film an indoor scene at the Homestead. When they where filming in Tunisia for AotC, George said he was filming 1 scene for EP III, I think this just involves what happens outside the home, they could have scenes inside that don't need the desert background. The dialog in these indoor scenes on Tatooine could possibly explain a whole lot more. A conversation around the diner table perhaps?