All of the Project Leonardo ships (NCL Prima, Viva, et al) are based on Fincantieri's Project Mille which is also true for MSC Seaside, Seaview, Seashore (and Seascape) as well as Virgin Voyages Scarlet Lady, Valiant Lady (and Resilient Lady). The Project Mille concept was first shown in 2013 and the first ship based on it (Seaside) has been sailing since 2017.
Since the shutdown, it's unknown who is gaining or losing at the moment. It will take time for things to get back to normal. NCLH is currently 4th behind the Carnival Corp, Royal Caribbean Group, and MSC.
Nothing is free.
Whether someone has a tattoo or doesn't have a tattoo has nothing to do with their behavior.
It is entirely possible to cruise on a ship that has a Haven/Yacht Club/Retreat/Suite Neighborhood/Havana type of section and never notice that something nefarious is happening behind those locked doors. Just enjoy the rest of the ship.
MSC has a Yacht Club as well as assigned dining for those outside of the Yacht Club.