Ostheer's Shtick is that they lack stronger light vehicle play.
That's their sole vulnerability. And guess what, each faction has one.
The problem with OST is that they don't know whether to invest in AI or AT early game, in other words they are on a manpower shortage.
The PaK40 seems quite unreliable against AEC/Stuart. They are too fast and have too much health, unlike the T70 which doesn't have the balls to enter its arc of fire as it will get twoshotted.
Brits having the best of everything and vetting up for literally nothing is a problem of its own.