All that stuff sounds like table and modelview stuff, though- backfacing missile launchers (also good for minelaying, chaff, **** like that) and something like a Pirahna.
I think it'd be better (and, last I checked, more relevant to the source, as unless I'm mistaken CMs are a different issue than regular missiles) to give the countermeasures a reasonable damage value. It's quite possible to give someone tailing you a faceful of countermeasurage if you keep going straight for a couple seconds and then brake suddenly, and actually making that something that'd be worth doing beyond just freaking people out in dogfights would add some new complexity to the combat in the game- something that's kinda lacking so far even with all the **** added by the SCP.