MK:
1. Space Mountain: Cover up the station at least so that it is darker, or retrack it like the ne at dl and replace theold beams with beg fat hollow supports found on rides like mummy or montu so you cant see them when you ride past, and update the affets, add music.
2. Pirates of the Carribean: Make all the caves you ride past in the beginning into a curse of the black pearl part where realy cool animatronics of the chgaracters and the ghosts are fighting, and put your jack sparrow animatronic in there.
3. Get ridd of mickeys toontown for either discovery bay, which would have an underwater ful survice nemo submarine resteraunt with real fish outside the window, and put tds's 20,000 lueges in the sub laggoon, or put in mickeys toontown with roger rabbit's cartoon spin.
MGM:
1. Star tours: either get new movies of the same film, because the current ones are so terribly blotchy and old, or get a new one based on episodes 2 and 3, with an updated surround sound because the current films special afects are so lame.
2: Muppet Vision 3d: Take it out, put in the great muppets movie ride, monsters inc, or finding nemo dark rides.
3. Tower of Terror: I would have the elevator make an extra stop before the hallway scene and I would have it stp at the mirror room, where rod serling says "wave goodbye to the real world," the car shakes violently, the lights and lightning flicker, and everyone in the mirror turns blue/into ghosts before he says, "for you have just entered the twilight zone". That or have the car shake volently when the bults of electricity travel up the hallway and the lights flicker in the hallway scene.
Epcot:
Mexico pavilion: Bring the resteraunt inside to life by turning it into a fiesta, with more upbeat music, kiddie rides, entertainment, ect... And PLEASE do something about that boat ride. "Please buy from me, I have best deals in town". Give me a break. I was insulted by that ride, and I'm not even mexican.