OKW as usual fares better vs allied blobs because u can kinda blob decently well with volks against rifle blobs and sometimes penal blobs, but u can only delay a 5man section blob, not that the cheaper volks should have a chance against a bolstered blob.
Ost has no counters. The mg gunner just gets instagibbed by a blob and even if u manage to suppress one squad, that squad takes little damage due to 0.8 RA and can sit there all day till another squad comes to flank. U can't protect mgs with grens when the section guns down the mg crew faster than the grens can force back the section. The supressed section then unsupresses then the 2 somewhat less healthy sections stop the remaining gren squad while the mg has already fallen back to base. A sound defense shattered easily.
It's Ostheer that has the counters against UKF, while OKW has to suffer. Ostheer has all the right answers against UKF:
1. Osttruppen -> Can trade favorably with Tommies (even if bolstered).
2. Sniper -> Bleeds Tommies, UKF will give away countersniper if he has no bolster before minute 5.
3. 251 -> 1 minute timeframe to push back before AEC.
4. 222 -> Comes early enough to prevent AEC from dominating you, can win against AEC if spammed.
5. Tellers -> Can be spammed everywhere if you went Osttruppen, best bet against Valentine.
6. Ost P4 -> Comes early, even if you made multiple light vehicles.
Add an MG42 and a Pak40 and you're pretty much set.
OKW has it far harder.