What's the point of being able to drain an enemy's stamina if they can still sprint and power attack you? I did some testing, and while an NPC had 0.00 stamina and was being continually sprayed with a wall of frost, the NPC was still capable of sprinting and power attacking.

I'm not entirely sure what is the reasoning behind not being able to drive your opponents stamina into the negatives. Power attacks drive the player to the negatives, but as far as I can tell, that doesn't seem to apply to spells that damage stamina.

Just my two cents.