The problem atm is in the attitude we have in respect to using tanks, infantry, etc.
If a tank dies atm, it comes back about as fast as a dead rifleman to the front lines, in many maps faster.
IRL, during WWII (especially for the germans) this would be completely silly. While people would certainly not want to lose a rifleman, a lost tank would in every way be for them. Hell, if you lost a single tank cause you ordered it to drive into an infantry trench alone without infantry support, you would probably get court marshaled.
In RO, I see in maps like Leningrad and Berezina tanks driving into areas irl they would not even go in modern combat, just so they can kill a single person.
The other problems is that on tank+infantry maps, there is an absurd amount of tankers per infantry, such things would only happen if we were looking at tank armies (which would have supporting infantry, but they often would not get directly involved in a masse tank vs tank fight. This makes Arad completly silly, while in a map ogledow, there would be plenty of infantry already in the defensive positions (if they were present) probablty with somewhat more AT weapons since they knew they were going up against tanks.
A ratio of 2 or 3 PTRDs to 12 German tanks would not have put the fear in them. Probably 1 or 2 PTRDs, plus some AT guns, all of this very well camouflaged, per german tank (and not absurdly easy like everything is to spot while being a tank commander) would make tanks more reluctant to drive in without infantry support. I'm not sure about the actual numbers, but thats probably closer to reality of a german tank brigade (attached to a german infantry division) vs a Russian infantry division.
As for a german tank div fighting a Russian infantry division, well the tanks would be there only to achieve breakthrough (or they are being used completly wrong) which both in game and real life they could achieve really easily. It would be a silly thing to model.
As for Germans fighting Russian tanks, panzerfausts are freaking everywhere and very powerful, which probably gives them too much AT capability if anything.