I got to agree, it would be difficult to do much more about stirring in general. When I had a lower end controller, "don't move your controls so rapidly" used to get me killed as it was just from minor spiking with quick, small input changes. And all I was doing, was following a stirrer, trying to line up a shot. HTC would have to sit down and get more elaborate with what kind of input changes wouldn't be allowed. I really don't think that will happen any time soon.
The IL2 thing is pretty annoying. I don't doubt the range of the elevator deflection, but I do question the ability of the pilot not to be knocked silly by the nonsense displayed in the game sometimes.