Except in WC3 and SC they managed to create completely different armies.
The thing is, blizzard NEVER implemented new armies after initial release of their RTS.
Thing is all armies of wc3 and starcraft share the same basic core design of workers harvesting minerals/gold and everyone has a base at their starting location.
Brits in OF took a huge dump on every core mechanic of the game and from what i understand OKW nearly had the same fate happening.
That they design new armies with only specialists or good allaround generalist infantry/tanks is also bad since what makes coh into coh is the design of supression, flanking, cover and mines and relic just ignored all those mechanics for the design of the new armies in WesternFront Armies.