Ok, here's my grievances. I don't really care that UOE and GMR closed. Epcot and Hollywood Studios are dead; they've been dead. Their messages and ideas have faded away with new additions and age. They also don't represent what guests want. In the 80s, the future was bright and limitless. Now, the future isn't very interesting. We are more cynical as a society, and a ride about the future sadly won't work anymore. The best example of what a ride with Epcot's original message would be like now is the end of Spaceship Earth. Does anyone want that? The future is much more vague than before. Making a ride about the future will become dated within 5 years. It won't even draw crowds to the park. Why would any business open (or keep open) something guests don't want?
With Hollywood Studios, film is a different medium. Huge blockbusters come out every weekend now. On TV, movies are played constantly. Most importantly, the idea of celebrity is very different. Magazines are exploiting celebrities every day and showing their worst sides. Movie production isn't very special. People don't care about the process of making movies anymore. If you are interested, you can watch behind the scenes footage at home. Guests just care about the movies themselves. The Studio idea was bad from the start, honestly. A fake studio? Why? I mean, who cares?
Epcot is looking to become a vague "futuresque" park. They'll add in IPs and try to make the park look cleaner. World Showcase will add more booze and more IPs. I would love to see EPCOT Center return, but it's not going to. This is what guests want, IPs. If guests want it, then Disney is going to give it to them, as they should. While Horizons looks like one of the best rides ever made, it didn't have any waits towards the end of its life. As a result, it only makes financial sense to get rid of it.
Hollywood Studios, unlike Epcot, never really had a great message, rides, and theming. It had an idea, sure. However, it's never had enough rides or enough, well, anything! It was underbuilt and has remained that way for over 25 years. I welcome changes being made to an IP based park. Would GMR have fit in new DHS? Yes! Would it have drawn in as many crowds as Mickey ride? No. We all know Disney is a business, and it's going to be run like one.
Lastly, my biggest grievances lie in the awful, awful, AWFUL maintenance the parks recieve at Disney World. The only one treated even decently is Animal Kingdom. Even it has a broken Everest and Dinosaur. Disney should fix their current attractions before building more new ones. Cause my last visit to Disney World showed a resort in pathetic shape.