Why feed flapping to the pilot? I must not have been clear.
I am referring to instrumentation to measure flapping to see if it was doing as they wanted/needed to get the rotor to perform to their spec/design goals. I think I presented that badly.
Why feed coning angle to the pilots?
By the time you see a problem with coning angle while you are flying, you have either already screwed the pooch, or you are too busy trying to get the bottom of the auto right that it isn't your primary nor your secondary scan.
I'll go back to reading this thread, there are a few very good posts here from folks who explain things very well, while others are all noise, fuzzall insight.