Well, I spent a good hour or so playing around with the new German faction and I have to say that they're well balanced. The Obersoldaten definitely shouldn't be nerfed because it was designed to hard counter any infantry the enemy could field, and it's not as if they're invincible; there are counters and even a light armoured vehicle can completely halt an advance by the Obersoldaten.
Dude, a hardcounter is something else than a lawnmower where the lawn is infantry.
Where is the fun in seeing a unit and having to retreat your squads?
They just rek. Rek rek rek.