Indy has proven it can be a popular addition to 'Magic Kingdom' and Jungle Cruise has lines that make me sweat just looking at them. They both have a place in the park, IMO, and while I don't go out of my way for JC, I do think it's a classic people would have a serious problem with if it were replaced.
Toad, on the other hand, was (IMO) expendable. Yeah, I know, Dumbo would be a fairground attraction but for the main character, but Toad...c'mon. *yawn*
Now, Toad as a thrill ride....that could be fun!
Just had to edit to add: USF/IoA certainly aren't 'empty'! Maybe you visited on a slow day?
Toad, on the other hand, was (IMO) expendable. Yeah, I know, Dumbo would be a fairground attraction but for the main character, but Toad...c'mon. *yawn*
Now, Toad as a thrill ride....that could be fun!

Just had to edit to add: USF/IoA certainly aren't 'empty'! Maybe you visited on a slow day?