Still i don't blame him for not jumping right back into star wars after return of the jedi since star wars became painfully identified with his divorce, since Marcia and He split when jedi was in post production.
next followed Temple of Doom, was it any wonder this was a darker film both lucas and spielbergs marriages came apart at the seams.
the only good thing about Temple of doom was Spielberg met Kate Capshaw, the current mrs spielberg.
Lucas has yet to be remarry, but he is reportedly humbled by the fact that he raised three adopted children alone and they keep him grounded.
So George lost his way with the prequels it does not in any way mean he cannot make another good movie. as with any profession practice is everything, not directing in twenty years put one on shaky ground.
As been reported he moderately improved on Revenge of the Sith, he dedicated ten years of his lifeblood to the prequels and he says he enjoyed making them.
Star Wars 77 nearly killed him. it is no wonder why he prefers to do most things in post by computer it cuts down on the work that he the director has to do and removes stress from the situation.