If a character has a root motion animation applied it can be difficult to position properly or do anything that assumes the pivot point is in a normal position. if you have mocap of an actor walking a distance and pressing a button any adjustment would involve pivoting 6 meters away. The act of yawing the character to line up to a button requires swinging them in space on the end of a 6 meter arm and then repositioning them. A means of Easily switching pivot point for some operations (or a true pivot point the system knows about) would make these operations much easier.