Lucas can do 2 things that would make these "New" movies work, if they make them.
First of all, give the entire project to A die hard who is A movie director.
George is to gung ho on CGI, and surrounds himself with Yes men. Yes he has creative control, but it is time to let your baby go. Just sit back and enjoy the mountain of cash coming your way, and if the movies rule... your former fan base will respect you again, and hand over lots of cash.
He should also look at video game developers, "THE FORCE UNLEASHED" has a better story line then the new trilogy. Guys making video games can do a better job then him. The 1st game had some control issues, but the 2nd one I downloaded the demo and the controls are fantastic.
The other thing would be impossible, but it seemed to work best for him the first time. Eliminate the majority of the CGI, go back to making sets, limit your budget, make things stressful. He dealt with all that and made one of the best movies of all time. He deals with none of that now and made the biggest disappointments of all time.
I would say use CGI for space shots, explosions, but limit it... and no 3d.
That would never happen.