They should add a fishing building for the dock that can create food.
they should also make the kitchen area near the weapon planner into a chemical producing building
they should make it so you can visit the shelters of people.
never hurts To add a mode to hunt wild animals with a coop partner just for food where you use your own ammo. It would be good practice chasing down flexing targets or hunting targets that will react
add the ak47, ak105, mp40, and the 100 Shiki Kikan-tanju