Blizzards don't give advantages to immobility. Cutting down sight range means it's much easier for your opponent to flank you if they know where your units are.
I agree 100% that the cold adds useless and tedious micromanagement though. That's the worst part of blizzards and I can't understand why they did that. It doesn't make the game more fun or interesting, it just adds an APM tax.
I agree 100% that making the game harder to see is ridiculous. The challenge in CoH should come from fighting your opponent, not struggling to see what is going on.
