My main suggestion is either 1) non-linked (or linked) control blocks for power, shields and thrust OR 2) a single "systems" control block for all three. Function being that as a ship takes damage and begins having power, shield and thrust outages, a second non-pilot player can use this control to restart those systems one by one without the pilot doing a full ship restart. This would give properly crewed capital ships another good bonus against ships without crew.
Currently players can enter computers on a ship and help by taking over turrets - this is great as player controlled turrets don't randomly decide not to shoot enemies in the clear.
Another nice idea that I know has been suggested before is letting a passenger hand charger the jump drives from the jump controller.
Main thing though - consider allowing human crew to somehow manually restart damaged systems on a ship during combat. Would allow copilot a to serve as not only turret monkeys but an excellent Damage Control system so the pilot could mostly continue fighting while crew tried to control damage.
Currently players can enter computers on a ship and help by taking over turrets - this is great as player controlled turrets don't randomly decide not to shoot enemies in the clear.
Another nice idea that I know has been suggested before is letting a passenger hand charger the jump drives from the jump controller.
Main thing though - consider allowing human crew to somehow manually restart damaged systems on a ship during combat. Would allow copilot a to serve as not only turret monkeys but an excellent Damage Control system so the pilot could mostly continue fighting while crew tried to control damage.