Yes exactly what I've been thinking after playing SoT. Don't forget the "specialist crew". Could translate to some kind of class for players. The following is from Pirates! Wiki
Cook
Cooks prepare tasty meals at sea, which helps to keep crew morale up. This allows you to stay at sea for longer without the crew turning on you. Always a good thing.
Cooper
Coopers help you preserve your food in barrels. This means that Food takes up less space in the cargo hold, allowing for more 'useful' goods to be carried.
Gunner
Gunners train your crew in fast reloading. Your cannons will be ready to fire much quicker with the Gunner, and the difference should be evident immediately.
Navigator
Navigators increase the speed of your ships. This helps make voyages between ports less tedious and ship battles a bit easier to win. Combined with the Cotton Sails, the Navigator can help make your fleet a speedy force to be reckoned with.
Quartermaster
The quartermaster enforces discipline at sea. This helps keep the men in order and reduces the chance of a mutiny.
Sailmaker
The Sailmaker can repair your sails at sea. At the start of each month, Sailmakers repair 25% of the sail damage on all your ships, similar to the Carpenter.
Surgeon
Surgeons can treat injured crew members. In ship battles, half of the people lost during the sword fight return to duty afterwards.