From: Portaferry, N. Ireland
I'm going to chime in here a bit. Alvaro has a point and you will have to ask what you want from WarPlan. Is it a WWII simulator with options to try different things or is it to recreate history?
The Germans were unprepared for the first winter largely because they heavily overextended themselves with the one last push to take Moscow in Oct-Nov (Typhoon). This offensive exhausted the troops and left them very vulnerable. There were dissenting voices in the high command that wanted to pause and regroup. If so, they likely would have issued winter equipment. The logistics system was probably an either or: either supply the offensive or refit the troops. Ironically, the cold weather in November actually helped the Germans despite the lack of winter equipment; the freezing ground allowed motorized movement again.
But why did the Germans make the last push, or for that matter, why did the attack the USSR? They thought that they could deliver a knockout blow and win. But, that can't happen in WarPlan. You don't have an incentive to capture Leningrad and Moscow early on in the hopes of destroying the Soviet political system. The only incentive to attack the USSR is that if you don't, they will attack in 1942, and it will be worse for you. It is hard to tell if the Germans captured both Leningrad and Moscow and held onto it what would have happened. I would somehow build in an incentive for the Germans that would push them to try for victory in the east.
As for history, if you clamor for a winter penalty, shouldn't the Germans also have a penalty for retreating? Time after time, the top guy refused to allow units in danger of encirclement to breakout. Sometimes, local commanders disobeyed, but the delay was costly, and often they were sacked afterwards. I suspect that most German players will pull back and work to save the troops. Ironically, these stand and fight to the death orders might have actually saved the Germans in the first winter. To some degree, the Soviets weren't that good yet and had trouble following up on their successes. They just had an opponent that was staggering from exhaustion and bad planning from being overextended. They also had the good fortune of having Japan attack the U.S. and not them.
One question is whether to penalize a player for trying something different or to force them to slavishly follow the mistakes of history.
Perhaps one solution would be to have snow and blizzard to amplify loss in effectiveness. For example, if it is 90+, little effect, but as the unit drops to 50% a larger effect.
My original post was about Blizzard attacks, not specific to '41.
The Soviets launched multiple winter offensives in every year of the war, several of them did some serious damage. To the best of my knowledge none of them were halted because of bad weather.
In Warplan you can attack during Snow turns OK. However against a competent Axis player you are not going to accomplish anything much by attacking during Blizzard.
In fact in my present game Blizzard turns are a bonus for Axis, giving them a rest from Soviet offensives.