I have noticed that they dont see more than like 1m in front of em, its ridiculous, its like they are blind.
This makes the Patrols almost not part of the game because they are so easy to first hear and then hide from.
Increase the LOS massive would make the game more interesting, and if this will be to hard, then increase time you can hear em. (its pretty long as it is so i think this would be fine).
Also maybe add smaller patrols like 6 SW or 9 PM/Berzerker or some mix, and at more random spots, would be cool.