Could there be (or is there already?) a right click option for the missile launchers that makes them hold fire until all the missiles are ready? It would lower overall DPS but it would make overwhelming PD easier.
Single tube missile launchers would be fun too, that way we could spread the love all around our ships.
Volley Fire Missiles
you can select every missile launcher using ctrl and make them hold fire and when they are all ready you make them shoot.