• biome-agnostic world generation (technically at least terrain gen already is)
• cubic chunks
• more caves and an, ideally easily modifiable, different progression system

Minecraft can’t be revolutionized. It needs to die. People need to start rethinking block games and their possibilities. We need the devs who are currently modding the shit out of a corporate corpse to actually design the tech behind a new game. It needs to go beyond mere content creation.