While WDW is getting some new attractions this year, it is the DLR that is having its 50th birthday. I'm an AP'r at DLR and I fully expect the DLR to be crowded most of the year. Room bookings are solid.
Having said that, with the use of F.P. I'm usually able to handle just about any crowd. Being flexible on what you want to ride, doing the parks early morning or the evening, etc. will also help with the crowds.
Since WDW is still giving out AP rates for April 15th & 16th(just booked a week ago) for all three hotel levels, things should be fine. Its when all of WDW is booked and people start moving offsite that I hope to avoid.