I have been screaming this from beta1 here and on servers. The PzIV especially should be going with some HTs to flank from the south, for both attacking the farm and the 2nd line. The PzIIIs should definately be getting up, over and down the 1st line ridge as fast as possible. Better yet, mixing up their assaults from frontal to flank. Getting on the north flank is a great position and the PzIIIs should continue to close the distance with the KVs. The closer you are, the less angle the KV has to turn his turret. Cut down the angles! Never ever should a PzIV camp the ridge tops, flank, hide and support your HT troopers.
The key to the map is capping the 1st line, Farm, and 2nd Line as fast as possible. After that, the Germans can totally control the flow of battle. Just because servers start running 50 slots will not change the tactics/strategy required. It only gives you more men to hit the same spots and still requires coordinated arty, armor support and feet in the trench lines.