I play single player, usually in experimental, and specialize in Intel. I dearly love my junk turrets. Unlike some here, I don't usually start using them a lot until after about level 40ish, when I've picked up a point or two and have a turret that's at least Tier 3. They really come into their own after gamestage 130 or so, and especially when you've got all 5 points spent and can use two at a time. Tier 6, modded with Rad remover, cripple em, barrel extenders, and drum mags are what keeps an Intel spec person alive and viable without having lots of points spent into other weapon types and are vital for Tier 5 missions. (I hate you, Shotgun Messiah Factory).
Now, I do like my pistols for POI fun, but once you start getting lots of radiated zombies, cops, and multiple other nasties, you really need the backup those turrets provide even without having reached 5 points spent. Please, do NOT nerf my sweet babies!!