Glad you had a good time!
I've done two cruises, neither Disney, and found the pools to be a zoo on both of them the entire time. It wouldn't surprise me if that's just how all cruises are. Even on my later cruise, on one of those humongous Royal Carribbean ships, which had a huge deck and multiple pools broken up into different clusters, there was more demand than supply.
RE other Disney Cruise ships: I get the feeling might like the older ships more than Treasure or Wish, which are much more focused on Avengers and other Non-Disney brands than the four older ships. I've also heard about weird layout issues on the newer ships. Nothing I've heard about the newest class of ships makes me have any desire to sail on them.
Not sure if this is something I can blame on the Carribbean or Crusing generally, but based on the Carribean cruise I did six years ago or so, I'm with you and not a fan of port days. Getting off the boat, in addition to being a process, felt like I was being moved on a conveyer belt to areas that just all felt tacky, forced, and fake. I mean, techinically you're in another country, but it sure doesn't feel like it with how commercialized it is and how many jewelry stores and Senor Frogs sorts of places there are at every single stop. Getting off at a port felt closer to being at Epcot than I would have liked. You don't really have the time to really see these places and get off the beaten path, so you end off largely stuck in heavily touristed areas where everything you come across could just as easily be found in any other tourist spot, with very little actually specific to or emblematic of where you are.
I'm not really in any hurry to get back to the Carribbean in any capacity, though I'd do it if I got a good rate on Dream or Fantasy and just not get off the ship other than Castaway Cay. Generic tropical "sit on a beach" vacations aren't my style.