The Greedo-dialog-problem could be solved in more of a George-Lucas-manner: Instead of cutting the dialog, Adywan could add a digital Greedo. Of course, for this to make sense, Greedo would have to survive ANH. Adywan could change the scene in ANH:RHD so Greedo evades Solo’s shot, too! Actually they could shoot at each other multiple times and always evading the other’s shot until their blasters are empty. Then Greedo could go home and live until ROTJ. (And it’s the exact same dialog, because in Jabba’s palace he tells someone the story of how he once met Han Solo and survived.)