I dont know if this was mentioned before but it would be awesome imo that the next world gen takes a page from rimworld and generates massive regions of different weather and make this like an actual world then a slice of it. for example a map size similar to world 8 but massive regions like:
the north and south completely snow covered
throw in some big oceans here and there with islands spread through out (classed as islands so you cant make vaults but still live on them)
swamps that can be as big as a supergrid
center mainly temperate to encourage most people to live in the Goldilocks zone
Deserts with unique uses and fauna
mountains large enough for volcanoes.
etc
I feel something like this would make this a world with more depth then feeling like a walking simulator at times also would give people like me who like to explore or those into the nomad life a new aspect to enjoy, or people who want a challenge to survive in the inhospitable regions like deserts oceans snow.