That is the "worst" idea you ever heard? Each pavilion at EPCOT was made to house restaurant, a theater and a boat ride to showcase a river in the country. There is expansion room for a boat ride. Bayous are flat, they do not have drops like Splash. Bayous are American and not part of the west or frontier. What is your real concern for having Tiana represent America?
In any case there was room behind Splash for a new attraction. Splash did not have to be removed.
I've said it before on here but hiding SOTS away is an affront to James Baskett's memory and achievements. He was the first black actor nominated for an Academy Award for his role as Uncle Remus. As far as Disney is concerned no one will ever see that performance again. Not to mention Splash, as it is, has nothing racial about it. Disney is trying to completely "whitewash" history in the easiest way they could think of (by hiding) instead of celebrating the achievements of African Americans by 1. celebrating James Baskett and using SOTS as a teachable moment and 2. celebrating Tiana in a pavilion that represents America.