I have a question regarding China and, to a lesser extent, European Russia: is there any reason we observe in these regions—and nowhere else—a patchwork pattern of grassland and plains tiles? Have the locations of these tiles been based on research? Are there drier microclimates in the middle of China that justify having plains surrounded by grasslands?
I'm asking because I find these patterns confusing, when other regions of the world seem to have usually larger areas of a single terrain type. I do wonder if this was done just to provide a more textured map, in which case I would recommend reworking the area to have mostly just grasslands in the humid southeast of China, with a smoother transition to the drier regions.
Russia is less bizarre, but there are puzzling occurrences of plains tiles such as those NE of St. Petersburg.