I find Dave's comments intriguing. I agree that linear response is important, I'm surprised that a tail rotor blade compromise was required to achieve it. Surely in a simple type this could be achieved by mechanical biase within the controls, and within the comanche by the FBW system?
I was about to shoot Dave that exact question, cause I never understood it either..
Then I opted for just asking your opinion..
Still might just ask him, if I do and he answers I will get back..
"mechanical biase within the controls" might just be a bit more complex. There is normally more of a problem due to unwanted mechanical bias. A mechanical fix would be sweet though..