I'm really not qualified to comment here, since the last light twin I've flown was a Queen Air in 1972.
There is at least one instance where dead foot - dead engine would not apply. If you have a runaway prop, something you would most certainly want to get rid of, the aircraft would yaw toward the good engine.
I just brought this up because I think the nose yawed left - nose yawed right procedure is a flawed one.