That's actually not a bad idea. To balance this Dead Silence could counter it.
I can hear suppressed weapons quite clearly in my AO. Not sure why you feel you need a perk to do something that already happens.
Good idea, except they don't even reveal footsteps yet. Can't see tryeyarch changing it that much.
I have never had a problem hearing silencers. Perhaps you are complaining about the wrong thing, I would focus on nerfing the amount of screaming that occurs whenever a character gets a kill..of course this problem is fixed by playing HC.
No one is complaining. Complaining and giving ideas are to different things.