ToT is not only one of the top 10 rides at Walt Disney World, it is in the top 10 rides in the whole world.
The ride has presence, setting, music, story, excitement, thrill, a good throughput, it's not too short, it is well placed in the park in terms of location, it's well lit throughout, extremely detailed.
I would imagine it's only real weakness is it's difficulty to maintain (something not really fixable with an overlay)
To alter ToT would be nothing short of a disgrace. For me it is in the untouchable list. On the West Coast, not so much.