I can't wait to get my allagan chest so I can stop wearing DL. I put off getting the chest/head for as long as possible for that exact reason. And the can't move your neck comment in my original post wasn't a joke. If you haven't noticed, try and target someone standing beside you.
It's also very apparent when running, you'll see the fin on your head move with the direction of your head. Notice it's only moving with your shoulders. You are also staring at the ground while your shield is out.