Agreed. I think the AI could use a lot of work. I notice most enemies have some kind of "approach distance" where they won't come any closer. Perhaps it's intentional but if enemies never come closer to engage, at any point in time or their HP, I can just hide behind something a few meters away and pick them off with quickhacks and headshots, even when they're completely aggro'd.

It's worse than that. I was hacking a turret and slowly picking them off one by one while they "approached" me (all of them immediately knew where I was even when I was in cover) and never even engaged with the turret in the middle of the camp blasting them off.

Enemy combat range is based on the weapon they have. Snipers will hold long range, medium range for rifles and pistols, close range for melee/fists.

Seeing through doors is fine in this game. The player can do it to using things like "ping" or taking control of cameras, so I don't mind if enemies can too. Trying to attack through doors isn't very smart though. However I also very much enjoy when AI has an enemy hiding away in some corner trying to hack my brain while I fight off a few others directly. Or when an enemy I'd tagged but lost track of visually has taken a path around me & come up from behind. So there's some problems, but in general it seems okay to me.