At the moment there is a mod called Landtex and it's made by Picolly.
What it does is to "flatten" the ground texture to make it look more realistic. It is a simple process and I think it could be implemented in ArmA 3, since some servers don't allow mods. There's another mod called Midrange Terrain Texture Replacement by Bad Benson wich replaces the midrange textures to make it look prettier. I think combining these two and implementing into ArmA 3 would be a viable yet effective solution for the blurry midrange and pixelated textures. {F18424} {F18425} {F18426} {F18427} {F18428} {F18429} {F18430}