We were on the 12/3, 4 night cruise also. We were not YC. Seems odd, as there were limes, cherries, and garnishes at every bar I visited. I have to have limes! 😎. Parking was horrible. It took us about an hour from when we got in the parking line, until we parked. 😡. Never heard if there was an excuse/reason. That needs to be addressed with the port I would guess, not really MSC’s fault. Since the last time we parked in that garage, the set up changed.
I heard they had trouble getting people off the earlier cruise and that is why boarding was slow.
I am afraid I do not know what you might be alluding to, about some different types of people on the island. I was at the South beach (I believe that was the name) lagoon all day and all was good over there.