one thing that has always bugged me about this show is the double-edge sword of the actual audio volume of the zombies.
they'll hear a zombie coming from a while away, or open a door to somewhere and hear one immediately. then sometimes a zombie will just hold their breath or go into ninja mode until they are literally over the shoulder of a character before letting out a nasally "Woowrrr"
It doesn't really make sense. I get that it's just a show, and people are poking at various inaccuracies anyway, but it's funny that they'll make zombies conveniently loud or conveniently silent at times.
if they're going for the scare factor, i would imagine that having the show a lot (visually) darker and being able to hear the zombie(s), but not SEE them until it's too late would provide for a lot of tension and scary moments without literally spawning zombies on people.