Hang on - don't try to introduce ergonomics or pilot comfort into helicopter design. It compromises performance and anyway, why break the age-old tradition?
I don't have the problem of personal discomfort in the 139 but probably only because I don't fly the 139.
The S-76 causes a similar problem, so does the S-70. In fact every helicopter I've flown has discomfort issues in some respect. Not to mention the aching neck, sagging spine, lowered shoulder etc.