I made these pictures of what I think needs to be done to improve Disneyland.
First of all, I think there should be more of a segue between Fantasyland / Matterhorn / Tomorrowland, achieved by adding two (shorter) mountain ranges on either sides of fantasyland. Although it would cover a bit of the lagoon, people in the subs wouldn't know the difference.
In Tomorrowland, they need some drastic new architecture, they also need to drop the retro theme. I added the citadel from HL2 and a high speed ride based on the maglev cars from Minority Report, the ones that go horizontal and vertical.
Here is a view of everything I changed, the citadel in Tomorrowland, mixed in with some bits of high tech architecture taken from concept art of "The new Washington DC 2056".
Ok, so hope you like my ideas and drawings, maybe boost my rep points?