The one thing I would say that makes the humen enimy ai sad. Is the fact that after you engage with them, and you disapear is that they go back to searching around like they dont know your even there. shore now they verbaly talk about finding you but they dont do anything cool like group togeter and sweep rooms. (E3)No they walk around all alone (not even useing cover) and get choked out.
They need new behaviore. group up and stelthly sweep rooms together in your last know location. (useing cover) opon being alerted. or descovering a body.
In the apocolipe if i was sitting in a hotel and a guy shot one of my buddys. id get the **bleep** down. be very quite, listen. and try to jump him unaweres. Id probebly die. he has 3rd person, lots of guns and like 5 times the health. But at least i didnt get choked out.