Do you see fuel or muni op's? Also note that okw units are a lot more costly fuel wise? But i do agree on the vet 5 thing, should be removed and compensated with some other buffs.
the lack of fuel or muni cache isn't a problem in a 2v2+ for a mixed axis force. The wehr can easily build it for them. Caches are an additional manpower investment as well. The okw lack the option to invest in cache but they can still use the manpower else where.
the only okw units with a direct wehr counter part are the puma, panzer 4, and panther.
The Okw panzer and okw panther are both superior to their wehr counter. The okw panzer4 have significantly better armor and the okw panther have a more accurate gun and better mgs.
the ost and okw puma cost about the same. the ost actually cost more fuel and the okw cost more mp. (280 mp 80 fu vs 320mp 70fuel).
The okw unit cost more fuel, but they are superior.