Yes, the partisans appear too strong. In one case I attacked one Russian partisan with three regiments and air power and took more losses than the partisan- the air unit lost 2 points! If you allow for rules changes in the options, this will allow you to turn partisans off and on. The level of activity can then be matched to either historic levels or varied with the level of success the Germans are experiencing on the Russian front. Alternately, when playing a live opponent, there could be some garrison requirement.