The major threat of the early available tanks (t34, T70) is their capacity to engage, chase and eventually run down entire squads if the proper AT is not there. That's just not an option against a properly fielded OKW army.
Yes! 100%. Well said. Dealing with OKW is never about actually engaging cost effectively and winning engagements because of the insane DPS and how forward HQ/heal means being forced off the map isn't very punishing. It generally just comes down to how many squads can you wipe on retreat by catching a lone squad with your blob or by chasing it down half way across the map with a light vehicle which you can do easily because of lack of fausts and 4 man squads. Even then, Volks can't 1v1 a light vehicle in the open because of pushing. But then the longer the game draws out, there stops being potential for chasing down squads lone squads or getting caught by a blob. If you've wiped 2+ squads by the time tanks hit the field you're still in the game, if not you will probably eventually just lose unless the OKW makes a mistake.