If you were a "we go all the time" type, I'd say skip, but for a family that hasn't been there but once, I would say there is plenty to do. Especially with TSL opening up. At the current rate, I could see everything and do everything once and be done by about 2pm. If you had to choose between doing another park and this one, I'd again say skip, but since you're not giving up any other park, this one still has a good time going for it.
I mean, Star Tours, mirite?