If the problem are caps, then just nerf them so they can get hunted down with fighters JUST LIKE IN EVERY OTHER GAME!:angry:
But the idea seems pretty neat, it seems to make trading and circling the whole map a bit more worth it.
EDIT: Vanilla freelancer, Freespace, heck even in Star Wars Fighters can own Cap ships, don't remember them all right now, but in most games fighters eat cap turrets or simply pwn the caps themselves.