I deleted the A-10C section out of the SnapViews.lua file and regenerated it by hitting RAlt+Num0 after spawning into the Cold Start mission and before making any head movements (TrackIR disabled).
This is definitely the default head location. And the HUD graphics, same as before this update, don't fit in the glass. Yes, you can move your head around to get the full picture, but is that realistic? Any A-10 pilot or maintenance crew should be able to answer. A photo of the real HUD taken from normal eyeball position would be even better.