My thoughts:
-I don't blame Lucas at all for cashing out. That's some serious cash
-Just because its Disney doesn't mean it will suck. As stated earlier, Avengers was badass.
-Lucas in a minimal role could be great. Have you seen his work since the prequels (and Indy)? It's largely garbage. He's lost his touch (though some would argue he never had it).
-Not sure how I feel about 7,8,9. I assume its the storyarc post RotJ that the books took up? I never read them but picked up most of the story from fans on the net, etc. Also, are the new movies live action or animated like that Cartoon Network show?
The Thrawn Trilogy is a worthy succession of the franchise, but I'd rather see Bane but its probably too dark for Disney.