It’s an extreme example but I was just trying to illustrate how it would affect the decision making of each team member differently. Two players would start retreating while the other two would try to clear the path ahead.
Fatshark made a conscious decision while implementing these levels. They are obviously okay with people having an easier experience by lowering their settings. They could have just made an ugly layer of black material that would represent the grain which would also work on lower end PCs, but they decided against it. In the dark parts they could also just make enemies completely invisible unless they are next to a light source, but again they decided against it.
It would be nice if they than give players an option to just remove these annoyances if they wanted, e.g. trimming the grain down a bit and putting more light sources throughout the dark levels, without having to lower settings, but also allow players to keep these “immersion” settings if they wanted it.
Maybe a mod will give us that…