I too have a fair amount of turbulence on the half-faired. Goes away when I tuck, but riding in the upright position was why I got an FZ6. I recently put a Puig racing screen on it, and that moved the tubulence up a bit from mid-shoulder to upper shoulder which is an improvement, but not a total solution. I'm now looking to acquire the Puig touring screen to see what this is like. Kneedraggers said it was on backorder with no ETA -- not sure how to interpret that. Interesting suggestion to try without the windscreen at all.
My first bike was naked, and wind blast above 65mph was intense and tired out my shoulders and neck. I put a big windscreen on it which helped a lot, but created turbulence and side buffeting. Maybe you pick between wind blast and turbulence. Never ridden a fully faired, but it doesn't seem to me that having all the shielding around the engine would much change the turbulence, which seems to be around your chest, not the lower frame of the bike.