LucasArts lots all their best people in the early 2000s when they shut down the adventure gaming division, including Steve Purcell and Tim Schafer. Most of them went to Telltale and Double Fine. Which was really unfortunate since most of their critically acclaimed titles weren't based on the Star Wars franchise.
They became a pain in the arse to work for after that, mostly due to unreasonable deadlines. Bioware swore they'd never do business with them again after KotOR. Guess EA changed their minds for TOR. Though that game hasn't exactly been a success story.
Disney does have a fairly good track record of publishing good games from existing franchises... back in the 90s. I'm not so sure about today. Though new blood injected into LucasArts, and more creative freedom, could get the ball rolling.