For all of the sins he subsequently committed in the name of Star Wars, George Lucas spent a huge amount of time conceiving and writing the first Star Wars film, and that commitment shines through in the final film. The Prequel Trilogy on the other hand was painfully over-written, with a worrying focus on bureaucracy and the somewhat sterile relationship between Anakin and Padme, and that cost the flow of all three movies. Ironically, it was when the films shut up and went for the balls-out entertainment factor that they soared the highest. Even recent tent-poles The Dark Knight Rises and Man Of Steel were comparatively poorly written both were littered with plot holes and logical inconsistencies, and though the spectacle of both movies distracted to a certain extent, subsequent viewings add impetus to those problems. Though it seems like Disney have gone backwards in acquiring Star Wars, they have bought a property that already has multiple treatments, which will at least partly form the basis of the story-arc, since George Lucas is on board as a creative consultant. And in Michael Arndt they have a fantastic scripter, even if his experience doesn't necessarily appear to translate on paper.
