If you keep an eye on cruise covid news, a few more ships have reported positive cases on board. CDC's list shows 62/109 reported some level of Covid onboard within the past 7 days. 47/109 clear for now.

Carnival Freedom denied docking at Bonaire due to positive cases among crew, cancels Aruba
https://www.cruisehive.com/carnival-...-bonaire/62251

RCL Odyssey of the Seas - 55 positives among 3,587 passengers and 1,599 crew, skip Aruba & Curacao
Symptomatic passenger didn't notify medical staff upon boarding. Ship had to return to port one day in https://www.usatoday.com/story/trave...id/8976715002/
Other cases discovered with routine testing
https://www.usatoday.com/story/trave...as/8990149002/
May need to isolate onboard in quarantine quarters until disembarkation instead of de-boarded at a port & flown home via private jet
https://www.stuff.co.nz/travel/trave...to-the-dungeon

RCL Symphony of the Seas - 48 positives among 6,091 passengers and crew members. An interview later on in the page might be an anecdotal data point for higher risk cruisers who may need more medical care along with a prior sailing's cruiser who had symptoms and did not report to medical staff.
https://www.usatoday.com/story/trave...an/8960209002/
A failure in communication if someone symptomatic reports and is told not to test or isolate? https://www.nbcmiami.com/news/local/...ruise/2645975/

10 offloaded from QM2 detected during routine testing. 1,473 passengers
https://www.travelmole.com/news/covi...new-york-city/

Might be a less predictable time to cruise which I know may matter to some. It also seems like not all of the RCL trips off boarded positive passengers (and keep positive crew in quarantine onboard) which may result in skipped ports as countries wait for more information about omicron and how to treat more severe cases since certain existing antivirals may not be as effective (or available).

CDC Ship Based list status snapshot
Green - 47
Orange - 7
Yellow - 55
Red - 0