I have used a missile-based loadout in my fighter, and in 1vs1 it was very good. Even in group battles, while your ammonition lasted, you could easily disarm (destroy all weapons) two bombers, as long as you didnt waste missiles on shields.
And then, when you begin using the gunboat missile turrets... fighters and bombers fall like flies. Ask the two xenos (XA) in bombers which attacked my gunship the other day...
And mines like that would basically be like current missiles, just faster, and dropped behind. In my honest opinion they should be semi-stationary objects. If you eat one, fine, but they shouldnt be an explosive with a thruster. That's what the missiles exactly are.