It evens things out. Disney blocks the lower passes because they expect non-AP crowds to fill the gap. Dapper Day will bring some crowds; school breaks in CA are all over the place because different districts have different schedules (traditional, year round, home school, etc.); and since Easter is so late this year, Spring Breaks are not focused around the actual holiday. Normally, when the lower APs are blocked, the parks aren't as busy. But there are always exceptions to that, like Christmas Week. Most APs are blocked and DL hits capacity a few times that week every year. Don't worry about the crowds. Mornings are almost always good -- you can get a LOT done between rope drop and noon/early afternoon. Use EE/EMH if you stay on site. If you stay off site, use MP to your advantage. Spring Break can be a good time to go because the parks are prepared for the crowds.