I really don't think the potential rotation has any bearing what-so-ever as 1) a loss ot tail rotor drive is normally a "YF" emergency without proper celestial positioning, and 2) it is less likely to be a "YF" emergency if you properly execute the emergency procedure which doesn't have a step for "looking out the window at what you're going to crash into."
Simply put, uncontrollable right yaw is just that - uncontrollable. The idea is to control yaw by controlling (in most cases removing) torque from the main rotor which gives you a different shit-sandwich of which left/right seat has no bearing on whether or not there is a positive outcome.
For what its worth, I fly from whatever seat I makes the most sense for what my training objectives are (initial aerial refueling, initial CQ's, initial NVG X's, etc.)
I think MB has it right with weight and balance and whomever mentioned Igor's original design.