I have played around with lowering the weapon effectiveness of CM's in the database to 0 and torpedos no longer explode on CM's.
However, I have yet to confirm that CM's still work in the sense of attracting torpedos. I believe they do... but more testing is required.
I believe, for CM's anyway, in the db editor, Weapon Effectiveness, is "Weapon Effectiveness [Against]" or something like that, as the Nixie is listed as having an 85% effectiveness, and I have heard that it is 85% effective in detonating torpedos in game.
Does anyone else know about this? It seems like something fairly straightforward. :hmm:
Edit: Changing the Weapon Effectiveness to 0 does indeed disable the countermeasures completely, as apparently the parameter is related to the chance the seeker of the weapon has to acquire the CM, not detonate on it. I think a doctrine change that specificially instructs the torpedo not go into terminal homing when it reaches the CM might do the trick, but I do not know how to code.