In this article: https://www.cruisehive.com/port-provides-update-on-why-carnival-cruise-ship-is-pulling-out/85884
San Juan said that Mardi Gras won't call because of fuel costs. At the end of the article, San Juan said that Carnival told them that Mardi Gras might switch to shorter 3+4 day cruises, closer to Port Canaveral.
This gave me ideas. What if Mardi Gras will take Liberty's place, Liberty takes Panorama's place (low bookings on Panorama right?) and Panorama does 7 days from Port Canaveral. Alternately, Firenze could take Panorama's spot, Panorama to Mardi Gras, Mardi Gras to Liberty, and Liberty to a high demand area.
Firenze could do exotic cruises to like South America or something to open something new for Carnival.
Of course, Mardi Gras and Liberty could just switch