I'm sorry your DD chose to leave too - but it sounds like you may wind up having a nicer time this way.
That would be hard to see her pretending not to have a good time. But she will be back and like you said, she'll really be able to let go and have some fun. I bet your Universal trip will be great!
From what I have seen their Meal Deal isn't worth it. You are restricted on where you can eat-only a few CS restaurants and none of the TS restaurants. I want to try Mythos when I go and possibly the Three Broomsticks and neither of those are on the plan.
From what I understand it is an odd combination of CS and TS. It is treated as a TS meal but you go to the counter and order you meal like a CS.