Notable additions to exploration update: cursed enchantments, shulker box/chest (keeps items when broken like a backpack), treasure maps (to find temples/monuments) and cartographer villager (to get treasure maps), /locate (gives coordinates of generated structures), woodland mansion (big house in the woods). new mobs: vex(angel ghost things), vindicator(villager with an axe that attacks), evoker(sorceror thing).
More stuff: totem of undying (kinda self-explanatory), llamas with carpet-saddles and can have chests. They form caravans and spit at wolves. Next snapshot on Wednesday 28th of Sept.