Interesting new discussion! It’s been a while 
I think this fits well alongside the discussion that was had ages and ages ago regarding alternate planes: Alternate Planes - How should they work?
I remember with alternate planes @tom had said that they didn’t just want “oh hey look it’s the fire plane, and the water plane” and all the really generic stuff that has been done, they wanted to branch out a bit.
It would definitely be interesting to have a mix of the standard expected biomes when it comes to world gen such as tundra, desert, swamp etc. etc. - I’m sure you could just borrow everything from the book of Minecraft. But it would be interesting to mix it up with some perhaps less than generic areas?
I have no idea what myself … perhaps some sort of “wasteland”? Dead trees and bushes litter the place, poisoned food that seriously damage your settlement if you don’t have the correct abilities to farm them. Who knows … there’s lots to play around with!