I understand that. In your example, I would mechanically "fix" my aircraft after test flying to ensure roll does not occur. I rarely use subtrims or radio functions to fix an improper flying airplane. Obviously, not every type of flight problem can be solved, like yaw coupling, without a major redesign of the airframe but a simple mix would take care of that. But in the jet world, I still do not see a need for conditions like we have in soaring and helis.

Convince me!!!