We were due to dock in Nassau mid-afternoon, but because of weather, we didn't get off the ship until just before 4 PM. This did not allow much time to tour Nassau, so we limited ourselves to going to the Straw Market, which is a large collection of stalls selling inexpensive souvenirs. If this is your thing, enjoy it, and be sure to negotiate the price.
Again because of the weather, we were not going to be able to get to Coco Cay the next day, so it was another day in Nassau. We used it to go to Paradise Island with a day pass to, and tour of, the Atlantis Casino property. There was quite a bit to do, and the aquarium at the Dig, and other lagoon aquarium facilities, were enjoyable.
Because we docked on New Year's Day, the Kennedy Space Center (KSC) closed an hour earlier than usual, and so our RCCL tour was reduced from 7-1/2 to 6 hours, although with no reduction in price. When asked, the Explorations desk said we'd be able to see everything included on the original tour, that they just cut out "wait times." Unfortunately that wasn't the case, and after the main bus tour and rushing through the Saturn V exhibit, some of us managed to quickly get on the Saturn Simulator, while those who tried for the IMAX movie got nothing. And with the less time available, none of the many other exhibits could even be glanced at. Interestingly, even if KSC had been open to their normal closing time, RCCL could not have provided the full 7-1/2 hour tour promised, so Caveat Emptor!
We read many positive reviews of the 2 hour (or longer) bus tour of KSC, but we were not major enthusiasts. Our guide knew, and provided, more facts about the facility than we could remember -- or, after a while, care about. She was at her best when she related stories about her father, who worked there for many years, and where her real enthusiasm showed, instead just reciting a lot of fairly dry facts. Overall, though, this was a truly amazing facility and worth the time. Afterwards, as noted, we had time to only rush through the Saturn V exhibit, which was definitely the most interesting part of our tour, and a pity we couldn't have spent a lot more time there. The Saturn Simulator was another top-notch exhibit, and we believe all of the other, unfortunately missed, exhibit halls would have provided similar education and enjoyment.