It would be very interesting to role-play with the heroes. Right now they tell you a story and you hire them. End. They are empty NPCs. A personal mission to improve their performance could be interesting, and very important: they are NPCs with advanced statistics, which is fine, but their equipment is looter. They can have advanced equipment (it costs a lot of money to hire them) and that the equipment is anchored to them, that your character cannot steal it.