So instead of adding rides and lands, which they are in beginning phases of (whether we agree with those themed lands or not), the "fix" is to raise prices? Say they do raise the prices and crowds thin, that's going to hurt their brand AND bottom line because they have all this empty space and no one there to fill it, thus, they will have to raise the prices on other commodities and souvies in the parks to make up for the lost revenue of not filling the rooms.
Current management is doing what businesses today do. They listen to the money. If you're willing to pay more, don't think for a second that Disney is going to keep the same profits. They could hike the price to whatever they wanted to and the fact remains that even though the people may be gone, the same park would be there the next day, and then there'd be threads about the "neglect of the park for the $$ I'm paying to go".