I’m sort of a stickler about my worlds making sense, as much as they can be in a block game, and I know I’m not the only one bothered by the sharp line between two biomes of completely different climates, like verdant green forests and frozen tundras.
I propose that there should be minor, aesthetic variations of biomes when they neighbor more extreme ones, mainly with the coloration of the flora. Oak, birch, and dark oak forests when bordering snowy biomes become fall forests, with red/orange oak leaves, bright yellow birches, beige grass, patches of snow, and maybe a falling leaf effect. When next to deserts and badlands, they become dead forests, with desaturated leaves, patches of coarse dirt, and shrubs rather than flowers, similar to what we see on top of mesas. Plains have sparse trees, but should share the trees of the biomes closest to them, giving them a more varied look. Will also contain some patches of snow, sand, or coarse dirt along the borders to those respective biomes.