[Baalz]

I wouldn't say severely, maybe mildly. Except when defending territories deep enough to be steadily under your dominion for a time they won't be at cold-3 (well, at least not from your dominion). Even when fighting in cold-3, a high dominion wyrm won't have much trouble with almost any indies, and by the time you're fighting more than that it's trivial to stick a frost ring on him if you think it'll make a difference.