I don't know what you are planning on doing after you get off the ship, but late risers might want to sleep until they need to vacate the room, grab a donut and coffee upstairs to tide you over, get straight off the ship from there and find breakfast on shore. Breakfast on board is free, breakfast on shore you can have late and linger over.
We had early breakfast, and, although we are early risers, don't usually eat that early. So we didn't eat much, and then had a second breakfast at the airport.