Hi there!
Coronado Springs has 4 pools. The Digsite is the themed pool. It features a waterfall and a slide. There is also a large jacuzzi. In each resort section (casitas, ranchos, and cabanas) there are quiet pools. I have pictures of all of them on my website. I can't answer your question about how crowded they are at Easter. I've never seen more than two people at a quiet pool. Since Coronado Springs is a convention hotel the pools do tend to be less crowded. I would stay there again in a heartbeat. I found the pools less crowded than at other moderates (CBR or POR)