Here is the review I did of our 2005 cruise on the Holiday. We cruise on her again this coming March.
What a great review, Dave!!!
Hubby and I sailed the Holiday years ago, on a 5-day out of Los Angeles to Catalina and Ensenada.
We regard it as our least-favorite cruise -- but only because it was our shortest cruise, and the ports-of-call were not our favorites. The ship was very nice, and everything you say about it is true -- you definitely have a sense of being at sea.
I would also agree with your dream itinerary: 3 days at sea, 24 hours on Cozumel and 3 days at sea, again! Carnival may be missing out on an untapped market!