Another issue I had was mutually exclusive paths, I am not a fan of this. Seems too deterministic too me, why cant I at the mobile warfare juncture choose armor, but realize that my armor is not really effective with out armored infantry threrefore I work on both. I just really dont like the mutually exclusive aspect of the game as it limits my choices. Maybe a compromise would be you have to complete one before doing the other but please reconsider this choice. Especially given that you can completely shift doctrines, why couldnt you shift paths inside a tree?
I assume both paths will improve both, but the infantry path will improve infantry more, and the armor path, armor more. You can't emphasize both, because there would be no emphasis. You must emphasize one of the other, unless of course there was a third balanced path...