The winter mechanics both fit narratively (Eastern front), Aesthetically (winter!) and gameplay wise (CoH is all about controlling territory and supply and fighting from cover.)
They also blended well with the existing terrain mechanics. We already have water, so why is deep snow a suddenly a sin? It does pretty much the same thing. (water is actually worse since it's negative cover) Why is keeping your troops warm during a short ~3 minute blizzard so fucking terribly difficult? If you're turtling through the entire blizzard you're doing it wrong.
because water is one, really fucking obvious, and two, it's used much less. mostly it's just that it's used less. mud (old hill 331) and deep snow are identical in regards to the speed penalty and hill 331 was fucking terrible because there was so much mud in all the places you had to walk.
the freezing wasn't really an issue, i seldom lost any models to it and when i did it was due to obvious inattention (setup mortar where it's almost always firing and then forget about it or it didn't *quite* setup in cover). it was however fucking annoying and punished attempted attacks since your squads had to get cold in order to move forward and attack the enemy while they could camp and not get cold and if i had to retreat i was more likely to lose models because they were already cold from tactical flanking.
also, pretty sure blizzards are 60 seconds.
WHOA JUST LIKE NEGATIVE COVER ROADS. WHOA JUST LIKE AVAILABLE GARRISONS AND HEAVY COVER. It's almost like it was a tactical component of the map or something.
It was relevant all the time on kholodny's vp's, winter langreskaya and pripyat's central forest. Also possibly in team games but I didn't play much of them.
the biggest difference being that negative cover doesn't slow you down unless it's water and then it's mitigated by shallow water not being used much (mostly on summer versions of the seasonal maps and most of the summer versions got removed before the winter ones).
Retreat earlier? Kite your opponent without retreating? Use soviet sniper (unimpaired by snow) to do such things? Hide in the snow instead of retreating?
i always had issues getting my units to actually hide in deep snow. i specifically remember the time i lost a sniper on rezhev winter because he waded into the deep snow but didn't cloak. not sure why.