Question, if we already bought the full game recently for Xbox One X, will this be a free download on PC via Xbox Play Anywhere?
I think only games made by Microsoft studios or Xbox exclusives get that treatment.
So I started messing around with the individual graphical settings and was able to significantly increase detail from standard with a very reasonable impact on framerate. The single biggest difference is turning on the "high spec asset" setting. It makes the game render a ton more grass, I would say 2-3x as much. It completely fills in all those patches without grass, and it doesn't kill your framerate.
On my 970 (overclocked), I started with standard settings and changed these for much more detail with still mostly 50-60fps performance (which is acceptable to me):
NvidiaFlow=1
NvidiaTerrainTesselation=1
HighSpecAsset=1
ScreenFilterDetail=3
ShadowDistanceScaling=300
TextureAnisotropicFilter=16
If you have a better video card than me, you might get away with increasing ModelLODScaling to to 125, 150, or 200. I think it further increases detail and draw distance for grass.