I sort of agree, because I feel he'd make the same mistake as the prequels and skew it too far towards little kids. On the other hand, even if I haven't enjoyed his movies as a whole since probably War of the Worlds, it has to be said that he can still direct the shit out of a set piece better than almost anyone. Even in Crystal Skull, if you look at the Jungle chase and ignore the shit like the monkeys that I'm convinced Lucas threw in there, the actual blocking and pacing of that chase are excellent, very clear geography, a sense of build with characters jumping all over the place, very dynamic staging, a very rare thing nowadays (Only thing that comes to mind that hits in that zone is the openings of Casino Royale and now Skyfall). And then in Tin Tin, which is also mediocre, there's a kick-ass single-take motorcycle chase and a really cool pirate battle.
So I unquestionably think he's still got it, and with the control that Disney would have over the script, I think it could still be really good.

Either way though, he's flat out said he will never do it, out of loyalty to George, and I don't think he has interest in that universe at this point.

If they bring back Samuel L Jackson, then I'm out. Hopefully Disney realises that he was a horribly miscast actor playing a horribly underdeveloped and boring character who spent most of the time holding the stupid ball.

I'd feel safe, but I've just seen the Clone Wars episodes where they incomprehensibly bring back Darth Maul.

"DESCRIBE WHAT MASTER YODA LOOKS LIKE!"
"he's...he's...he's green"
"GO ON!"
"he's small"
"DOES HE LOOK LIKE A BITCH?!"

That article is dated May 2011.  We've known for some time that there is plenty of footage just sitting on the shelf.