that’s reasonable. I really like the winter theme map you shared, nice!
one thing worth noting as a benefit of other biomes would be tree types, like winy jungle and such.
A feature I would really appreciate is to change the scale of hexes, make them bigger or smaller. Some of the regions I generate are really perfect for the game I want to run, but it's just too many hexes, which gets troublesome if you run with 6 mile hexes, the distances between towns and dungeon sites is a bit too far.