One thing I noticed from that video is he put down a turret and the AI was just getting wrecked by it and didn't even turn to look at the turret. They didn't take cover or anything either. Why even bother wasting bullets on AI when you can just plop down a turret and let it do all the work? Maybe they do react to them and it was just that one firefight.
Jack Frags used it very effectively in the Dark Zone too. If agroup was out of position, he would pop the turrent to secure the kill, then use it to protect him while he finishes that player off and anyone who comes to revive.
So the Dark Zone you isn't necessarily PVP only?
Yes, it has late-game PVE content as well.
Maybe they will have world-event PVE bosses in a PVP zone similarly to MMOs. That design is fine with me, but I'd imagine it will alienate PVE players.