What's interesting I think is that SW is in a different position than Trek was when he took over. Even though the prequels were garbage, they were still insanely financially successful. This wasn't the case with Nemesis, which completely bombed right along with being a terrible film on nearly every level. Trek had no where to go but up. SW isn't as...lucky?...that's probably not the right sentiment.
Either way, Abrams may find that even if he makes a good movie, or even one that's just more fun and enjoyable than the prequels, it could fails to pull in the money that the previous films have. Realistically, he has a mark to hit because Disney is looking to make their money back.
While I don't think he's a bad choice, I would have liked to have seen them go for someone that could have done something truly unique.
You have to give him some credit though. Either he has the thickest skin of any human alive or he's so well insulated from public opinion that it doesn't effect him. He's about to have the two largest genre/pop culture franchises ever created under his control and all their rabid fans scrutinizing every move he makes. I'm not sure I'd want to be in that position.