Since you can't be troubled to do simple math and you accountant seems to be at lunch I will do it for you. Disney Land had as many as FOURTY PERCENT of their attendance comprised of annual passholders before their astronomical price hikes. Disney World has around 15% (based on an estimate of 50% growth in annual passholders over the past several years). Many argue that for every person who doesn't renew there are two new buyers to replace them. While that's not true at all, there is truth in that some new passholders will come buy. So, even if you anger as much as 25% of annual passholders for WDW into not renewing, you will always have some new AP buyers. Let's say it's enough to replace 10% of those who left. Now overall you have decreased your annual passholders by 15%. Since WDW AP's make up about 15% of the visitors you are decreasing attendance by TWO PERCENT. Disney already has a practice of slow-opening rides (example: one side of Space Mountain is closed for at least the first hour of opening) to artificially inflate ride times and keep more people walking around buying food and overprice crap they wouldn't buy if they were on a ride. You can bet your mansion they will maintain that practice longer if needed until the park fills up mid-day. That's why you will see ride times at Space Mountain at 50 min at 9:30am. Not because there are a ton of people there but because Disney is only running one side of the ride. Just for argument's sake let's say that ride times directly correlated to park attendance. A drop of 2% in attendance would mean Space Mountain's ride time would drop from 50 min to 49 min. Since ride times run on the 5's they wouldn't even drop the time.
I was extremely conservative in my estimates. Most people will argue that SWGE and other new attractions will attract a lot of new passholders, and there will be little to no change in the number of passholders.
Bottom line: This has nothing to do with crowding. Even if Disney brass was ignorant enough to believe it would, it has no chance of working. The reality is this is to increase revenue.