The wind across the disc in the hover is certainly a major factor when determining the viability of the flyaway - downwind it can result in several times the into-wind height loss to gain airspeed.
As we all know the key to SSE flight is speed or having the height to trade for speed - the question is, is the amount of nose down specified in the RFMs the result of actual test points during certification and, as I alluded to earlier, all about the quickest way to gain that speed instead of minimising height loss?
I would have thought that for any OGE hovering ops, minimum height loss would be the overriding requirement but I wonder if the RFM techniques are purely aimed at low speed configurations on departure or approach.