Obviously there's going to be cosmetic work done on one if not all the ships, and the Fantasy's issue with vibration has been planned to be addressed I just think the Pandemic moved the timeline for it up. But the conventional wisdom is that primarily the reason all the ships are wet/dry docking in France is to make changes to all the ships to accommodate the pre-destined mandated Covid-19 safety protocols that the CLIA has outlined and ones they're expecting the CDC to impose once the lines resume sailing, ie. removing the buffet in Cabanas to convert it to cafeteria style service by the crew, taking out any self service food/drink kiosks or stations (goodbye Eye Scream) reconfiguring/installing updated HVAC air handling/filtering equipment, rearranging seating through out the ship in common areas to allow for better social distancing (MDR's, bars, possibly theaters and kids clubs) and probably most definitely installing dozens of hand sanitizing stations through out the ship. They might also be configuring a select number of guest staterooms to be converted into isolation/quarantine spaces and beefing up the medical facilities with new or better equipment to treat any potential sickness on board. Getting this work down now is vital to be prepared for the eventual resumption of operations at some point in the near future.