I love the Sky, too. She's a great ship with lots of places to get away from the crowds, and lots of places to get into the crowds. Don't forget the sticky buns in the morning. They're only on the inside buffet line (on the Sky) in the mornings. They were remodeling Coco Cay when I was there in February, it's probably finished by now. If you go to Freeport, do take the shuttle to Lucaya. It's a beautiful beach, good shopping, and even a casino. The port area is industrial, but away from the port is a beautiful island, much cleaner than Nassau, with friendly locals.
We did the behind the scenes tour on the Epic, even though we've been on many. I just wanted to see the workings of this massive ship. I really enjoyed it and they even gave us some treats in the kitchen. It was a wonderful view from the bridge, great for taking pictures.