Next idea, but i guess for more hardcore players etc.
Take an look on this.
(http://o.aolcdn.com/hss/storage/midas/93e989baab47f72209b9815ced892469/200368978/wod.jpg)
(http://static.icy-veins.com/images/wow/garrison-ogre-waygate-frostfire-ridge.jpg)
My question is. is possible add an new game mode, focused on survival in frozen wasteland like Frostfire Ridge from WoW, with limited resources on map like wood etc? And pernament winter?
i dunno, some things can surely be done, but some other thing, we wont be able.
It should be possible to make it winter longer, since I have several mods [one comes with CC] where there's a Harsh starting condition for weather in which the winter lasts until I think its late April and comes in around October. In the same way, it should theoretically be possible to make a mod that makes the weather conditions always winter, or very close to always.
Just my opinion, I'd have to look at the coding to see for sure. [and I'm just beginning to code with this game.]