Those look like Premium Economy seats based on their generous width, not the crushing 17"-and-change width of typical Economy seats.
1) they would shift the time of departure from 6p - midnight to 3 am. They'd let everyone sleep in a special part of the gate area which would close to passengers not on the flight. Passengers could also go on board the plane and sleep while it is at the gate if they preferred. About 30 minutes before departure everyone would be awakened and they would board. This would avoid having to arrive 2 hours ahead of time and the delayed departure would still get the passengers to their destination at a reasonable time.
OR
2) they would get rid of the overhead section of the plane for redeye flights. They would stack horizontal chairs three high and everyone would be horizontal for the entire flight.