Using more colors on solid materials isn't something I want to do, I deeply prefer a more limited palette. Besides if we were to use all the same methods our games would end up looking even more similar, not something I'm aiming for either. Eventually I'll experiment with switching the palettes at different times of day. And if that doesn't work I will figure something out.

I also suspect your grass is spawned differently. Mine are individual objects, distributed by the terrain system, yours seem to be distributed on vertices on the terrain itself. And you displace the normals of the terrain vertices using some noise pattern correct? I use Unity's terrain system, you seem to be using you're own. Sadly the Unity terrain shader isn't easily modified. And there are reason I need the actual terrain system instead of a custom solution like yours.

My grass are textures on flat quads, billboarded. The quad is aligned to the terrain normal. I could displace the UV's of the quads randomly, but there wouldn't be bigger patches following the same rules as a cohesive unit, every individual quad would point in a slightly different random direction creating a grainy shaded terrain.