So when there's mud, what do you do ? Check your troops, organise refit, drop resupply, fix rail tracks, move reinforcement to the front and press END TURN ? That's it ? I'm having 3 turns of mud in a row ...
If its first mud turn of many, then get cozy. But spring of 42 you'll get mud, clear, mud, clear sometimes. Frustrating but I still will do one or two attacks across the whole of the front. I look for where a Soviet Brigade is trying to hold the line somewhere and usually a couple of hasty attacks followed by a deliberate one will make him run for cover. And also helps to knock the fort down before it gets big. Just hunt and somewhere you'll find a victim.