I think it's helpful to see EPCOT's mid-90s decline in the context of the overall creative decline that was going on during that period.
Consider: the '90s were when comic book artist Rob Liefeld became a millionaire even though he drew pictures like this:
The '90s were also when we almost got a Tim Burton-directed Superman movie where the character couldn't fly and looked like this:
At the same time, the people in charge of Superman's comic books changed him into this:
The '90s were also when George Lucas yanked the original versions of his Star Wars films off the market, pretended they didn't exist, and replaced them with the Special Editions.
The '90s were when Rick Berman temporarily drove the Star Trek franchise into the ground by progressively making it blander and more predictable.
And don't forget that the '90s also gave us the beginning of big, loud, and horribly stupid movies by Roland Emmerich and Michael Bay.
The '90s also gave us the wonderful decision by a Hollywood executive to make a movie starring Rob Schneider, as well as an even worse decision to make several movies starring Pauly Shore, including Bio-Dome.
Joel Schumacher's Batman films were made in the '90s.
Vanilla Ice? The '90s!
Space Jam? The '90s!
Shania Twain? Also the '90s!
Shaquille O'Neal's film career?
Definitely the '90s!
My point (yes, I've really got one!) is that the forces that turned EPCOT Center into Epcot weren't limited to Disney, but were at work throughout the entertainment industry and resulted in lots of nauseating dreck being vomited out onto the public. In many ways, these forces are still at work (witness Transformers 2). However, there's also been a backlash against them, to some degree:
Rob Liefeld's work is now universally reviled. Superman was restored to his normal self. Batman will never have rubber nipples again. Nobody will hire Pauly Shore, and only Adam Sandler will hire Rob Schneider. It's safe to say that we will never see another movie starring Shaquille O'Neal or Bugs Bunny and Michael Jordan. And last we heard from Michael Eisner, his "big project" was a Bazooka Joe movie.
So there is hope. A tiny bit of hope, yeah, but it
is there.