Some more things not to miss:
The color changing paint in Marvel area in IOA. (I've never seen this myself, but it sounds neat.)
In UStudios, be sure to take pictures at all the "special effects" photo opportunities. I have done this and these turned out to be our favorite souveniers!! You will find several of them throughout the park.
Be sure to walk through the US "city street scene" areas. Also, note the "sets" built at the end of the street - down from "Twister". There is a fake subway entrance and sets that look so real until you get right up on them.
Nan