1. Mine Train thru Nature's Wonderland
2. Adventure thru Inner Space
3. Carousel of Progress
6. Skull Rock
7. CircleVision 360
When they built Big Thunder Mountain Railroad, they should have temporarily shut down the Mine Train for the duration of the construction. They should have built Big Thunder in the location of the Saguaro Forest and Living Desert. They should have had the loading area for Big Thunder where the loading area for the Pack Mules was, and the Big Thunder train could have gone over the Natural Arch Bridge and to the mountain for the fast part. They should have re-routed the Mine Train's track around the Big Thunder Mountain but left the rest of the track as-is. Then, they could have opened both and had 2 major attractions at basically the construction cost of one. Instead what they have now in that area is a medium roller coaster and a petting zoo.
When they built Star Tours, it should have replaced Mission to Mars, which was also a motion simulator attraction. It should not have replaced Adventure thru Inner Space, which should still be there. The removal of Mine Train thru Nature's Wonderland and Adventure thru Inner Space are the two biggest losses to the park.