Oblivian:
Punters and tour agents won't be pleased alike
13 night-er that also had Napier, Tauranga and Auckland on the cards.
https://www.icruise.com/itineraries/13-night-new-zealand-cruise_golden-princess_3-10-2020.html
If the rumors are correct, and the test results are negitive, I think the passengers will be quite happy to step off the ship at the final destination on or ahead of schedule.
Being trapped on a sick ship must be a scary though.