Just posted this over on Magic as well:
Just got off this. It was... fine, I guess? I mentioned this over on OU, but I wondered aloud whether the ride would end up being a Transformers (I.e. an almost reskin of another ride), and there are soooo many moments that were directly lifted from Despicable Me and The Simpsons. The ride makes the other two seem redundant because it rehashed them both over and over.
In the same manner that I generally choose Spider-Man OR Transformers, I would choose Simpsons and Despicable OR Fallon, and other than the newness factor, the former two are better rides on the whole. It's not that Fallon is bad, per se, it's just that it'd be like Hollywood Studios opening Iron Man Experience next to the 50s Primetime Cafe. Sure, they're the newer, shinier rides, but it seems like the older ones were made from an idea instead of a statistical chart, and as such, are used to their full potential (as of their respective openings).
Side notes: the queue is beautiful and amazing and Gringotts needs to start operating like this yesterday. The wait feels much shorter than really is. The theatre, however, is very poorly themed, and does not feel anywhere near the level that we should come to expect from Universal as of this decade. The CGI makes Soarin's issues look like the tiniest of potatoes. The soundtrack for the ride was nice; I felt like it fit well.
If this ride were replacing The Simpsons or Despicable Me, and had better CGI, and a better themed theatre, it would fare better. As it stands, it's more of the same in a park that's overrun with poor CGI/motion based theatre attractions, and it (for me) removes some of the novelty of its counterparts because of it.
This could have and should have been so much more. I refuse to get behind the idea of filler attractions. Universal and Disney are far too successful to allow quality to slip whenever they reduce the scale (and smaller scale attractions are just as important), and this ride would've fit right in pre-Comcast. That's a bad thing, and a dismaying sign for all but Nintendo and Potter.