You know, Disney wouldn't have had to bring the franchise back from the dead with a tried-and-true formula if Lucas hadn't have done his best to kill the damn thing. Imagine if Lucas had done all the right things on the prequels, like hiring amazing dialogue-writers and dedicated script editors and maybe not have staffed his QA department with a bunch of "yes men" and using a director who actually wanted to film on actual sets. Essentially, imagine if the prequels were *good*. Disney would be free to take more risks because:
A: The survival of the series wouldn't hinge on this one movie being even decent.
and
B: The series would be known for being successful at trying new things.
But because Lucas, who is complaining that Disney played it safe, screwed the pooch three times in a row, Disney had to play it safe and will now continue to play it safe. Because while I do not doubt that Disney can make good movies, I very much doubt that they can learn the right lesson about anything. Ever.