I am still not satisfied with color/material transitions.
The problem is that at low distance it looks good while on high distance it looks a bit weird. That a problem of many games and it's usually fixed blurring the transition texture as higher is the distance or adding some color variation.
On earth there are sudden "spots" but they're masked by the fact that color of plants is changing. On north america it goes from sandish yellow to light green and then suddenly changes to dark green if we reach Canada or north-west part of USA.
This is not very different from SE, the only change is that SE has a set of textures that is always the same and you can't mix them (like 50% and 50% because it would look weird, or maybe not, it eventually worth a try). It's the same on other planets, even desert ones:
Also on Mars it changes from gray to orange. I know it's something that SE always did, but this new implementation makes this thing hard, even if I think what is it now is already very realistic.