It really could go either way, but I'm optimistic. While Disney can do some pretty banal stuff, this is also the company that lets Pixar do its thing and set Joss Whedon up to make one of the most critically and commercially successful superhero films of all time. Disney has some very talented creators on its payroll, and it's pretty likely that many of these folks respect the original trilogy and are skilled enough to recapture the good qualities in new installments. That, and it's finally out of George Lucas' hands.
Then again, they might cast Zac Efron as Han Solo's son, at which point I would just rage-quit the franchise.