Have you ever watched the Red Letter Media reviews of the newer movies? They're long, but funny as hell and spot on. And they definitely identify Lucas's main problem - he has some great ideas that need to be tempered by people who are actually SANE. In the first movie his creative control was limited (and thank God for that, or else we'd have had a midget Luke Skywalker and a reptilian Han Solo). For the second and third movies, he wisely deferred directing responsibilities to more skilled directors and stayed behind the scenes.
But fast forward 15-20 years, and now Lucas is alone on top of a mountain of money, power and ego, surrounded by sycophants who don't dare tell him that his new ideas not only SUCK, but SUCK HARD. The steady hand of Gary Kurtz is long gone. The funny thing is, the RLM reviews show footage of his staff meetings, and you can see the WTF???!!!??? looks on the faces of his underlings as he describes the awful things he wants to do. But again, his opinions can no longer be challenged.
What this all boils down to is that there's about a 99% chance that anything he does in the future will suck, and I simply don't want him to do any further damage. I wish he'd just release IV, V and VI on blu ray as-is and then go away, but that won't happen. God only knows how many more "Greedo shoots first" moments he has in store for us in his next round of mindless tinkering.
I'm not mean; I just don't like you.