Dave,
I really think this thread has wandered all over the map. You now present one enormous tome that seems to be a detailed mechanical speculation about the possible problems (none with any outward symptoms except Lu's ranting).
I read your post twice and was struck to ask this question:
What does the rotor do that you don't like? If you can't say it in one coherent sentence, then it probably isn't a problem. Or as you say, "I am certainly not suggesting that there IS a problem here"
If you were speculating so wildly about your own helicopter, we'd all be amused. I am sure owners operators and makers of the Robinson expect more than what you have offered (or that Lu regularly offers) as foundation for your (non) concerns.