OKW isn't strong in the lategame anymore.
- OKW popcap is way too high on some units
- vetted upgraded allied basic infantry are superior to OKW infantry, and compete with OKW elites
- allied tank destroyers are better than OKW tanks, combined with the infantry superiority
- weak indirect
- pretty meh doctrines
All combined to make OKW pretty underwhelming in the lategame. OKW is pretty much disadvantaged at everything useful in the lategame. It's really not that weak in each area, but they all add up to be pretty underwhelming. I look forward to the next patch, it really wont need to change much to fix it.
This is from 1v1 standpoint, I don't know about team games.
