But Disney also has a huge chunk of responsibility as to why crowds are what they are. I did my college program in the spring of 2005. That was the year of The Happiest Celebration on Earth and certain things were brought in to each of the parks. Hollywood Studios got Lights Motors Action, Epcot got Soarin, Animal Kingdom got Lucky the Dinosaur, and Magic Kingdom got an overlay on Pirates, Small World, and the castle as well as the play area Pooh's Thoughtful Spot. LMA is rumored to be closing, Lucky is gone, and Pooh's Thoughtful Spot is gone. So, from that celebration, one new attraction remains. That's it.
Since then, Magic Kingdom has added the new Fantasyland which has 2 new rides and an extra Dumbo. Epcot has added... nothing. Everything currently at Epcot (ride-wise) was there in 2005. Hollywood Studios added Toy Story Midway Mania, but didn't add anything else. It did change Who Wants to be a Millionaire to American Idol, but now that's closing. I suppose you can also say it added Jedi Training Academy. Animal Kingdom added Expedition Everest. So, since 2005, anywhere from 4 to 6 rides have been added, depending on how you look at it. BUT, they have added multiple resorts at Disney Vacation Club properties including Art of Animation, Bay Lake Tower, Animal Kingdom Villas, The Villas at Grand Floridian, and are about to open to DVC property at Polynesian Village. So Disney added thousands of hotel rooms without adding attractions. What did they think was going to happen? Of course crowds are going to increase in the parks. That's their own doing. But rather than come up with the correct solution for these crowds (giving the crowds somewhere to go along the lines of new rides and attractions), their solution is to limit how many attractions a single guest can experience.