I would prefer ECM to do what Sensor points originally did, extend the shot range of those that got the bonus instead of reducing the enemy. Shot range is too short. Would like guns to shoot further, not this nonsense of gutting shot range until ships are stuck with melee weapons to beat each over the head with.
Sensors used to extend shot range, then it was changed to damage bonus, now they reduce enemy shot range.
ECM could be another range extension (like how Nav works), and ECCM would be the missile boost (more speed, immune to flares).