The most well done sci-fi drama in recent years (arguably the best drama of last few decades) is Battlestar Galactica. BSG got it right becuase they focused on the character development, writing and realism (accuracy is probably a better term) rather than focusing on the amount of sci-fi content and adding the rest later on. Viewers who would cringe to watch anything science fiction related were quickly absorbed into the show in the same way non-sci-fi readers become absorbed in Orson Scott Card's 'Ender's Game' series -- becuase both creations are GOOD, WELL WRITTEN, WELL EXECUTED DRAMA'S in a science fiction setting. You could forget about the cylons and the prophecies and all the rest because the drama was excellent and not dependant on any special effects or sci-fi knowledge.
If a Star Wars spinoff were to have Larson and Moore (BSG writers) and a few of the associate producers from BSG as well, I could see it doing very well. Of course, all the good writing/production in the world can't overcome bad acting and vice versa, and while many of the actors/actresses in BSG were limited in depth, they were so overshadowed by those like Olmos and McDonnel that it didn't matter much.
What I see happening instead is a show similar in feel to Stargate Universe, which is a decent show, but feels as if it's been edited for TV and toned down so network TV viewers can feel good watching it. Which would be very very sad.