I am sorry for all these posts about unplayability. Granted I have not done much but fly around in different aircraft and tried different wind and TOD settings.
I love it, I can not get 90fps but as I could not before in NTTR with the settings I chose its all good.
I have had to make some adjustments to suit, removing AF and MSAA in game and replacing them with nvidia CP settings- AFx8, FXAA On, Antialiasing x8
I have flat cockpit shadows now instead of high and flat terrain shadows using the defered shaders and the cockpit illumination settings too. PD in the rift is 1.5 oh and high water for screenies
Overall and knowing that optimisation will occur I am more than happy at the moment:)