Disney has blown it on Epcot when it comes to expectations though. The new changes are taking soooooo long and have basically ruined the experience of touring Epcot literally for years. Almost no matter what they do now, the reaction will be "We put up with years of walls and a giant dirt pit in the middle of the park (still paying increasing prices) for THIS?" Nothing they do now will seem worth it for the time and aggravation it took.
That combined with modern Disney Fans' basic instinct to reflexively hate anything they change in the parks, even when we've never seen it person or it hasn't even been built yet.