Doug,
I feel like I understand the pitch stability issue pretty well, and agree with everything you have said on the subject. However, I am not sure that I understand why you are as concerned about the torque-over issue you bring up. Do we have any accidents that we can specifically point to and say they were caused by the torque of the propeller turning the machine in the roll axis until it caused an accident? I would love to study this subject more so that I really have a solid understanding of it.
If I correctly understand the remedies that have been identified and proposed to correct this situation, the first would be the use of a Tall Tail. Then the next option would be to use differing angle of incidence on each side of the Horizontal Stabilizer. Would a trim tab set on the back of one or both sides of the Horizontal stabilizer, accomplish the same thing?
Please help me to better understand why this needs to be addressed at the design level and what options a designer has to accomplish this. And if you can point me towards any specific accidents that back up this concept I would really appreciate it.