I understand the logic and what you're saying.
I've spent more hours than I care to count tweaking to high heaven but for me with a 100Hz G-sync monitor, TrackIR5, and DCS it always come back to the same. 60hz, 60FPS, Vsync On, G-Sync off, is the smoothest response.
See here: https://forums.eagle.ru/showthread.php?t=174828
And here: https://forums.naturalpoint.com/viewtopic.php?f=60&t=13991