Several problems with world generation.

[Ponury]

Great game but several aspects need improvement especially world generation. Too large percentage of water areas or sometimes reduced number or overgrowth of other biomes (in one of the worlds a lot of jungles and icy deserts but less than 20 maps with savanna and maybe 6 with desert), Would it be possible to give the possibility of determining how much of a given biome can be generated in a new world? Often cities die out to zero with the progress of time (100-300 years), could something be done about it? No possibility of migration of representatives of the Bone Wraiths race, all are from one family in a given city (nice but no possibility of recruiting them to your settlement).

[Haperski]

+1 theres too many waters that we can't do anything with it.
One of the reasons I keep rolling worlds is when the middle of the map is full of ocean.
Another is when there's not enough desert biomes or peaks.

Also sometimes the world generations would just spawn biomes in stripes

[b...]

I was playing with building my own city for about 60 in-game years now and the cities "dying out" seem to be a bug with food consumption that leads to a death spiral.
1. The pop cap for NPC settlements seems to be set too high and it eventually outpaces food generation.
2. Ingredients are eaten before getting converted in more filling food and domestic production plummets (even 13x for human cities 3 flour - 3 food, 1 bread - 40 food) .
3. Cities are rich and food is cheap so it starts pulling food from neighboring city
4. Neighboring city goes to step 2
If you play the world and not just wait in the menu you can usually interrupt the spiral by dumping 1k bread on the famished city before the plague spreads

And for bonewraiths: lorewise they are "created" at the bone altar that's why it's only 1 family so you will probably be able to "build" them eventually (If you can't already, i haven't played as BW yet)

[Johnny Boy]

Being able to play with more of the world generation settings at the start wouldn't hurt, I personally like taiga biomes best but they don't spawn as much as jungles or temperate forests. Plus they don't spawn with rivers or ponds as often, which makes it harder to stay on top of water until I can build a well. If I could edit the spawn rates or something at the start, that'd be awesome.

As for the bone wraiths I don't know if there's any way you can change that aspect without breaking his lore. Maybe they could be recruitable if you're playing as a bone wraith and the settlement is in a desert? I'm not sure how complicated something like that would be to implement.