[Erax]

Yes, fighters can launch seekers, although there are no such weapons in the basic game. The Crossover Mod does this with proton torpedoes and concussion missiles from Star Wars. Fighter-launched seekers behave just like ship-launched seekers during combat. You just have to be careful when modding them in because a stack of fighters with multiple launchers per fighter can fire off a HUGE stack of seekers !

I'd prefer it if PDCs were kept, but toned down (less range or less damage, perhaps). Fighter-mounted seekers will also go a long ways towards overloading enemy PDCs and reducing fighter losses.