I don't cruise very much. i was on a Costa ship about three years ago and the boarding process was a shambles. People were crammed into a small building for check in. At one point, the first floor was so congested that people couldn't get off the down escalator from the second floor (where all the check in procedures were). People were falling into each other. And people were still getting on the escalator because they couldn't see what was happening at the bottom. I was not impressed and decided never to get on another Costa ship.
My condolences to the families of those who didn't make it. I hope that those who are missing are just unaccounted for.