Giovanni,
Good thoughts, especially about the grandfathering, but I disagree that crashworthiness is relative.
The crashworthiness of the older machines is less than the newer ones, and less safe (still acceptable legally, and ethically, just less).
I checked some TCDS and found no light helos that meet the new requirements. (The EC-120 does meet the latest standards, but it is a far cry from the R-22 or the H-300 in cost and complexity.)