>>533970641
JA3 has a lot of it. I wouldn't say it's fantastic but it's at least something. Not only is it vital for positioning, but you have to be aware of noise alerting other nearby enemies. You can also get stealth kills, which is immediate death on their part without shouting or anything. It's not guaranteed but there are things you can do to increase the chance. Then there are different states like when they are suspicious, completely unaware, surprised, etc.
It mainly does boil down to just positioning and quiet kills though, at least so far. I suspect there will be more opportunity later to do things like set remote explosives.