Have you tried some of the shader mods? That had a big positive impact on my system.
I also noticed that for me it was better to turn the motion smoothing off. Now I can get 45 or above FPS in the instant action game (medium Georgian winter) for A10c-2. Even when flying low. I run a 8GB 2070 RTX. I guess this relates to my CPU needs to work harder to calculate the motion smoothing.
I run high textures, high cockpit shadows, medium vis range, no MSAA, no terrain shadows and 16x AF.
For VR I would love if they could make the cockpit crystal clear. I really hate that the MFDs, instruments and text are blurry unless I lean in. If I really crank up the SS the cockpit is readable, but that kills the fps as the entire game runs on high SS. Hopefully it should be possible to increase only the cockpit resolution. I run 1024, but cannot see any difference with 1024 every frame.