It's a stupid idea that is impractical and would be impossible to balance.
New things are fun, but onyl if they are fun for everyone, not the person pushing the 'FIRE' button.
its meant to be fun in the sense Fighters can have a better role in protecting cap ships instead of having projectile weapons that just go Bam hit bam hit Kaboomie
Edit * they managed to pull it off fine in star lancer. yet if i recall the only damage that would occur is the fighter that collided with the torpedo an the fighter an the torpedo going up or the cap ship that got hit by the torpedo it didnt have rediculous scatter damage