I don't think the Falcon's crew is customary for a ship of it's type. Why would you bother buying a ship like that if you didn't have the people to crew half of it's systems?
I think the Ghost in Rebels is probably a much better representation of the size of crew a ship like that would normally have.
I don't know much about the Ghost, but a typical stock YT-1300 only requires a crew of one, but can be operated easier with a crew of 2, and comes equipped with a single standard laser cannon, and those on a turret are not typically operated from a seat located at the gun itself, like on the Falcon. The Falcons turrets with the gunners stations located within the turret are a heavy ship modification. But even the Falcons turrets can be fixed to fire forward and the ship piloted easily by a single crewman.