When you have a Barrett or Ruger, the bots simply just crouch and shoot, or worse, if they have a chainsaw or knife, just sit there, making easy, yet boring game play. I think it's cool to have pinning, but they should make it that when you're aiming at them, they crouch and slowly move towards you, but when you're reloading or waiting a shot interval, they should get up and charge! Also, as soon as they come into sight of a sniper, they should commando roll before going to ground, making them very hard to hit!
Thoughts?