EPCOT Center in particular had art that was a virtual copy of what was finally built once designs were finalised. Look at art or models from 1979-80 and it's pretty much as was built.So TSL is looking like it got scaled back some, but that leads me to a general question about concept art.?
It's rare for anything not to change during design, but you have to think that when the starting point isn't that high to begin with how can it be allowed to get lower.