The point about the landing swing is a good one and there is no way to simulate that, even by leaving the failed engine at high idle. The yaw with an engine feathered is very dynamic.
Interesting observations. Personally I have not experienced the landing yaw on touch down in the many aircraft I have landed with a feathered prop in another era. . That includes piston and turboprop. If there was a yaw it was easily controllable and therefore negligible like a five knot crosswind weathercocking. On a light twin piston such as the Duchess/Seminole genre any yaw on a feathered touch down was a non-event and certainly not worth deliberately feathering a prop for just to experience a non-event.
