Yah, me too. I really like the different "feel" of Desert/Tundra/Ice Sheet biomes, with the problems of temperature and getting enough food adding another dimension to the game.
Normally I find the various ship parts and raids tough to deal with, so it's nice to have a set of problems along an independent axis, with a different "kind" of difficulty, as it were.
I enjoy colonies with an easy storyteller, but in a tough biome... raids are not much of an issue (especially when they freeze before getting in range

My guess (hope) is that Extreme Desert will be to "normal" Desert what Ice Sheet is to Tundra.
Then we can have a nice symmetry of progression between cold/hot biomes: Boreal Forest -> Tundra -> Ice Sheet on one hand, and Arid Scrubland -> Desert -> Extreme Desert on the other.
Can't wait!