Sounds potentially overpowered, but it might be fun. Could also imagine a model where it keeps rotating you if you hold down the mouse button. Some of the Jedi Knight games had some crazy combos like that.
You said overpowered, how about you stay on the spot (Don't move legs) and get hit by arrows even if you have the block arrow upgrade. Just to make some risk of using that power so players ponder quickly to spin or not.
I can already do that by horizontal swing and turning the mouse, but you could add a version where your entire chest spins around and costs energy the longer you keep it active
