I think this is cool news. It can't be any worse than the Prequel Trilogy. Disney has done a good job with Marvel so I think Star Wars is in good hands.
It may be fanwanky as hell, but seeing Mark Hamill again as Luke playing an Old Ben type role would make a lot of people happy. Don't make the movie about him, but have him in a support role, guiding our new hero. Maybe give him a hero's death. He could always come back as a force ghost later!