Let's be realistic:
- RockIt is popular, it'll get the Hulk treatment of re-tracking and hopefully a new soundtrack. It's become an icon of Universal.
- Revenge of the Mummy ain't going anywhere. Unless it's a retheme, it would be a silly move for Universal to get rid of it.
- Fallon is perfectly fine for what it is. Had the park not had 100 other screen-based attractions, the fans would have received it well.
All they need is relevant scenic/relaxing dark rides in the style of Pirates and Haunted Mansion. Easy to ride for all ages and understand.
There's only one ride at USF that is easy to ride, no motion base, and no screens/3D, - ET. But ET is in a poor state, which leaves most people unsatisfied.
I know Universal has always been the "grown-up" resort, but they are in a great position to invest in family/children based attractions for the next few years before having to go back to the thrill market.