I like the idea, though the mount thing can be nullified to a degree, with with LRMs even if they don't have lock can target the location more or less by moving the cross hairs over the location(but a little lower) and you can spread damage the location like carpet bombing it and you can force the sniper off the hill.
I have done that a few times with my Stalker.
anyways back to the topic at hand, I think dynamic is better than static as well as it would shake things up.