Pollution has went to far. Expect great challenges, like scarce resources, harder foes, and barely any food. Mobs are much harder, and the animations are a lot better. The mobs are much more realistic than normal mobs, so expect harder mobs.
RECCOMENDED TO PLAY WITH SINGLE BIOME, AND SELECT WASTED LAND FOR THE BIOME.
MCreator is limiting, so don't expect too much.