I have been waiting to post on this thread because I'm not sure how helpful my info is. My family was at WDW last year for Easter. We attended Easter Mass at the Contemporary in the morning and then went to Hollywood Studios that day. I had seen a post earlier saying that the Magic Kingdom is VERY crowded on Easter so we avoided that park. HS was not too crowded for that time of year and it was a very nice day! We planned our ADRs for Hollywood & Vine for lunch (my kids love Disney Jr.) and 50's Prime Time Cafe for dinner (thought it would be fun for my DMIL). Both were great dining experiences but there was nothing special about either one of them for Easter.
The night before we went to our resort's gift shop (The Wilderness Lodge's Mercantile) and ordered Easter baskets for our kids which was very helpful. I filled it up with goodies from the shop and it turned out to be quite pricey. This year I am hoping to bring stuff from home and just buy their baskets and have the store employees wrap it up (they said that this was an option) to save a little money.
In terms of the rest of the week for planning, we stuck with the crowd calendar and followed their recommendations for the least crowded parks. We got to the parks early also and left for an afternoon break and then returned at night. It worked out well and although there were a lot of people, it really wasn't too bad overall. We are going again this Easter and are looking to do one nice table service meal on that day but have not decided which one yet.