Actually the concept of OKW was the ardenes campaign and last german push where armored core was made of StuGs and Panthers. Then relic said "fuck it, WUNDERWAFFEN LOLZ" and we ended up with sturmtiger, kingtiger, jagdtiger and obers holding MG34 with heat seeking rounds.
lol thats funny, I guess even this new design concept isnt too bad in theory but horrible execution especially the Tiger II and sturmtiger being stock units.....