Certainly, it sounds great what they're doing, with the snow in particular. While I'd be happy with weather being purely aesthetic, if it also served as a physical obstacle from time to time, that would be one step beyond. Imagine a mountain pass blocked by heavy snowfall, forcing you to wait it out before you proceed or take an alternate route to bypass the weather. Or trekking across a narrow pathway as the snow gets heavier, forcing you to take refuge in a cave until morning. So many possibilities.
Right now, I'm imaging mage characters blowing / melting a path through the pass with fireballs, as a sort of pathsetter. Man... That would be amazing. You and your companion travellers (and the GI article says that NPCs may choose to follow you based on their relationship with you, implying that anyone could, and you could attain a following) get stuck in a valley... The snow is coming down hard. You have the option of setting up camp and facing the risk of some of your companions freezing to death, but the majority surviving, or blazing a trail for them and gambling everything.
Wishful thinking, I am sure, but it does me well to pass the time.
And Worm', that's where slowfall would come in handy, ey?