I'm really torn. I agree, the business model of the park has failed - the world is more accessible these days than it has ever been and there is less need for what is essentially a glorified travel agent.
However, I still love the concept of the park and would hate to see World Showcase become 'Disney-fied' to a large extent. Don't get me wrong, I love the films and characters but I think that the best rides at WDW don't involve any of the characters at all - Tower of Terror, Rock n Roller Coaster, Test Track, Space Mountain, perhaps the one exception being Toy Story Mania. I feel the park does need something extra - a dark ride of decent quality in most of the areas would help draw more crowds - but tying each in to a character would do the park no benefits.
From visiting recently I'd say that World Expo needs the least amount of work. A couple of the Pavillions needed work (Norway the noteable example) but they were a lot sleeker than the 'Future World Pavillions' at the entrance of the park. Despite by Disney-tinted glasses Innovations looked tired, Universe of Energy was very out of date and The Wonders of Life hasn't had anything in for almost a decade. It was sad to see so many empty/tired looking buildings in a Disney property when other parks are crammed full. If any area needed working doing it was these.