Well I think this is good.
Personally I have been a fan of his since Alias hit the screens.
His work on ST was good, very enjoyable and he does focus very well on characters which is something that was a bit thin in the more recent films. I think until plot lines are known and with JJ that will be the at the last minute it will be hard to say much. But yes, Lost, Fringe and the new ST all had time travel threads but SW has gone down that road as well, Dark Horse did a special story that crossed KoTOR, Dark Times and Legacy and while back.
My hope is better character, more exciting and action driven plots (no more senatorial debates) and a lot of fun, and Abrams has a strong track in this area.