[Fyron]

What are you talking about?

I am talking about an example where the CS I and ECM I were supposed to cancel each other out.

If you want many bonuses and penalties, you just keep multiplying or dividing. I don't see the problem here.

The problem is that you get unpredictable results doing this. It creates many more complications than the few "problems" it solves.

And, come on now. You wanted the so called "20% ECM" description to mean that it cancels a "20% CS"
Now you're complaining that the effect isn't exactly 20% when the combat sensors are not involved?
Diminishing returns are part of the point of using multiplication!

My point was that using multiplication is not that great of an idea. With your system, ECM does less than it should when there is no CS component.