Hi, Tammy! I absolutely love the Coronado Springs Resort, and while I have not stayed at the Swan, I did stay at the Dolphin, and it's just lovely there! I hope you are happy with your hotel choices!
Coronado Springs Resort is huge, but it offers so much! The children will absolutely love the Dig Site, which is the pool area. There's a giant Mayan pyramid, a children's pool area with fountains, the Explorer's Playground, and two arcades! My girls love the Pepper Market version of a food court, where you can go to any counter and choose a different meal, get your card stamped, then pay when you leave. And I have to tell you, quite a few of the Christmas presents under out tree this year were purchased at Panchito's, which is the very large gift shop at Coronado Springs!
With the park hopper passes, you certainly have given yourself more flexibility in terms of advanced dining reservations and breaks for the kids. You can do Magic Kingdom in the morning, head back to the pool for some relaxing, and then do dinner and Illuminations at EPCOT. It sounds like a great vacation is in the works!
Have a great time, Tammy! I hope the vacation is sprinkled with pixie dust for your little princesses!