Being a writer myself, I've always felt a little bit of sympathy for George Lucas and his changes to the dubious canon he established in The Original Trilogy. With Fans desperately latching onto a single line of dialogue and the EU authors attatching endless amounts of significance to every little thing in the original 3 films it must be very difficult to see where his original intention with the story still resides.
I'm not defending his terrible plot decisions (Midichlorians, Gungans and other stupidity) or his intense special effects wankery, I'm defending his right to his story. He created it, he has a right to change it, and we are not in any position to tell him other wise, the story does not belong to us, it belongs to him. I really don't think there is anything wrong with Lucas wanting to smooth over inconsistancies between The Original Trilogy and The Prequel Trilogy.
If anything, George Lucas's biggest problem is his inability to "kill his darlings" and his head has grown so big that he thinks craziness like Gungans and bacterial force power are a good idea. He doesn't acknowledge that he's written a horrid script, or that he's very bad at dialogue. He doesn't let actors do what they do best and he won't let anyone tell him that he's "doing it wrong".
I can't help but wonder if all these people telling Lucas that he can't tell his story the way he wants has made him more resentful and more unwilling to take legitimate criticism in some of the more technical aspects of his storytelling. People tell him "Why did you make Anakin a kid in Episode 1, isn't he supposed to be an adult" instead of "Your dialogue was terrible and you made some bad pacing decisions." I just don't see this as the best form of criticism and Episodes 1-3 have bigger problems than some of their minor slights to your precious "canon".