John are you suggesting to disregard the HV chart in the RFM?
Of course there are obstacle/wind/terrain considerations that necessitate a steep approach for operational purposes in some instances, however I think Bell would disagree with your technique of flying well and truly in the shaded section of the HV chart for just about every approach.
We observed the HV chart (mostly) when flying IFR offshore but a good part of my 18K R/W career was spent solidly in the HV curve.
I would also note that many Canadian training pilots will cheerfully put a 55/58/204/206/205/500 in a 150' hover and wack the engine.
That said, if you do not need to increase risk - don't - fly outside the HV curve.