I'm suggesting an app or an in-game editor that will allow us to manually create the world, not the one we have now in game. We need an analog of World Painter. It’s a tool that will allow us to draw terrain, rivers, and forests; paint in biomes; add ores; or even manually add single trees. It should have highly customized settings for the world, such as animal spawn rates, fish species, weather, etc. I think it should become a high priority, either for community modders or devs, since it will let people create more, and spend time quickly between updates. I would highly appreciate it, even if a tool would be paid.