I think it's pretty obvious that the decisions being made now are part of their long term plans. It's important to remember that these people working on these strategies, spend 40+ hours a week learning and understanding how the parks operate, with data we don't have access to, and on a level that none of us here can probably even comprehend.
Yes, going to a Disney park can be a terribly stressful experience today, and yes it can impact the desire of people to return. Disney knows this and has stated as such.
But the only real way to correct for this, is to start bringing attendance down. You have 20 million people going to a park (and with a business model) that was designed in the 1970s to accommodate half as many people. Raising prices might seem like a detriment today, but if it reduces the crowds and reduces the stress of a visit, it will be worth it in the long term.