We were on the repositioning cruise of the Costa Atlantica in April from Ft Lauderdale to Genoa. The ship's normal capacity is approx 2,300 - there were only 1,100 or so on board. There was only one sitting for dinner because of the shortage of passengers. It was a 16 day cruise with 8 at sea days - this may have turned off some people.
Although Costa is not HAL they are owned by the same company - There did not seem to be less than normal crew on board. With the lack of passengers there was never a problem getting a deck chair or a seat in any bar or lounge.