I do wonder if George’s sequels would have been better simply for acknowledging the prequels exist, and therefore a coherent work if you will. A prequel 2.0. Since he had no desire to redo the original trilogy.
More revisionism and retcons, I think; a quick example would be George making Leia ‘The Chosen One’ in his ST instead. It would have been intriguing to see how he executed that, for sure. Though for me, TFA, TLJ and DOTF made for, or would have made for, a better ST than what we know of George’s belated ~2012 ST outline (and better than what we got with TROS).
In the same series of interviews where Lucas said Leia was the Chosen One, he also said the Whills created Anakin so I doubt he planned to retcon Anakin being the Chosen One too. I think it’s more likely he intended on Anakin, Luke, and Leia all being integral to balance in their own way (which is also supported by the fact that it was Lucas who created the Mortis arc which features a father, son, and daughter)