actualy you can see that enemy see you or not
North NE East SE South SW West NW letters turn into North NE East SE South SW West NW when someone see you
like this:
North: Z = he do not see you
North: Z = he see you
but sometime you have something like this:
North: & Z = one of these monsers see you maybe even both
check this press V and change to show monsters here you see list of visible monsters with health
!mi-go lllll Hostile! xN
zombie hulk lllll Hostile! xN
!= he see you
x= distance betwen you and him
but focusing on single enemy to easier deal with him at cost of ability to deal with multiple monsters is something new