The turrents arent for killing, they are to damage an enemy so you dont have to use as much ammunition on them. SD said they would be like other games turrents and just do all the work for you.
The killing power isn't my issue. The detection is. I just tried playing around with the turret again, and same thing happens. Enemies cross in front of it, within 50', and it doesn't fire. At one point there were 4 (AI) enemies grouped up in front of it, about 5 or so feet away, and it didn't even sneeze. The 4 just stood there and shot at my turret until it went down.
I'm fine with a turret design that relies on the player more for kills, where a turret is more of a damage supplement. I'd just like to know if this is how the AI of the turret is meant to act or not. Perhaps I am just having consistent bad luck, who knows.