I don't think there have been many losses due to student/fenestron lack of pedal, just a few brown trousers.
I don't understand how you can write that. There has been extensive discussion on this clear trend, both within this very forum topic, and in the aviation media as well.
After wading through the NTSB reports for G2 and R22 accidents in the US from Jan 2016 when the first G2 accident appears to the present day, approx. 50% of the G2 accidents are associated with loss of yaw control, while the same is true of only about 20% of the R22 accidents.
It's also noteworthy that there were zero R22 accidents associated with low-g or turbulence in that time frame, but lots of rollovers, just as you said.