I don't think it is OP. Again, it is the cover system. The blobbed up squad just begs for a wipe. Stug E dies very fast, I mean, I have killed it with rushing Cons and AT nades.
Just get an AT-gun. If you already have a medium tank you have the advantage over him since Ostheer isn't the kind of faction which has 3 tanks on the field you have to fear.
And may I give an argument I have seen in the Scott thread: We can nerf it when Ostheer early game is fixed.
Probaly the battleservers (in New York, I believe) had some problems. Drophacking is not possible since the battleservers started. As far as I know, drophacking only works in a peer-to-peer system and CoH2 is not peer-to-peer.
It could have been the server, but hacks are unrealistic.