Um, well, you realize the asymetrical thrust (P-factor) across the propeller blade at high AOAs IS what CAUSES the asymetrical lift (accelerated slipstream) in back of prop right?, and a rolling moment a little greater to the left with the left engine dead than to the right with the right engine dead....

Lots of the time when I was teaching this people would often confuse "critical engine" with "reasons why an airplane rolls and yaws towards the dead engine". They are different things. Airplanes yaw and roll due to asymetrical thrust, windmilling prop (prop a/c only), loss of accelerated slipstream (prop only), and the outside wing yawing and generating more lift. No matter what engine fails, these always happen and they always cause a yaw and roll to the dead engine.