Oh, happy to comment on whatever you like. The only difference I noticed about the sail barge was regarding the actions and death of Mr. Fett, which I already commented on. Did I miss anything? I'll again confess that I think you did a good job, and it showed me it can be done and I will be voting yes when presented with your idea.
As for the Lars homestead and surrounding material, I feel you did a good job. It effectively told the story you wanted, and I thought visually it was very interesting. But I personally find it a bit distracting from the main story, particularly the flashback stuff. If we were to include a scene like this, I would suggest forgetting the Falcon once we're focused on Luke; we already know they leave Tatooine and jump to lightspeed. I'd also probably just cut the flashbacks and the panic in the X-wing and simply have him watching the sunset near his home, the sand blows in, he heads to his X-wing, and we're off. Especially with the choice of music, we know exactly what Luke is thinking in this moment, and flashbacks don't fit the Star Wars mold that well. It's not my preferred storyline, but again, if we were to follow your line, I'd probably imply more than I'd show...more powerful and Star Warsy that way.
As always, my comments are meant to be constructive, and I must commend you. You did good work, Ron. You should consider investing in the software and taking some movie editing classes. You've got the natural talent, and you clearly have the passion.
EDIT: in response to the sandworm question, what you'd probably have to do is show several worms throughout the desert, including somebody popping to the surface. This would make it clearer that there are other creatures present.