Hi Farber,
my settings are:
everything high (textures set to original), except forests and buildings detail set to low. If there's a way to get rid of the terrain square or make it less obtrusive I'd be really thankful.
I'm using FXAA injector for FSAA and some colour adjustments and am very happy with the way CloD looks otherwise. And no, switching FXAA off doesn't change the anything about 'the square'.
View from 7.000m: