There should definitely be a snow/cold biome
No thanks.
You see there is a lot of biome based maps better and worse ones and there is small number of open world build around certain eviroment - like small part medieval Czech in Kingdom Come or magical Sea of Thives inside of Carraibean.
I honestly don't want to end in another one biome messed patchwork of all kind of eviroments.
Because feeling of being in "one Sea" is important to me and makes sailing much more enjoyable for me.