Which is all very true...but some of what you've written will be used as an "I told you so" mantra when it comes to the Prequels. For me, having read many of his interviews, it was pretty clear that he was making this stuff up as he went on or "mis-remembers" certain aspects and remembers others perfectly well. It is very interesting but at the end of the day, it just goes to show how all-encompassing the creative process is when it comes to film.
I mean, this guy literally to the last moments in the editing room of Episode III, was still shaping the overall thematic structure of the saga, even though the five previous films were already done. I find that fascinating that he can ever do that.
Some would see your essay as the definitive evidence as to why the Prequels "don't work." I find it as evidence that the films themselves have flaws but the whole of the Saga is perfect.
Some of your conclusions I don't agree with, but you do provide ample evidence to said conclusions...most of the time. Again, it's a very informative write-up, you've produced. And, I'm glad you're putting it out there.