I have to say this is the first time that I don't like some of the things mentioned in the dev diary. It's known for a while now that there will be only two (division, army) or three (theatre) levels of organization, and I wasn't happy about that from the beginning. But now that I see how this works I dislike it even more. I can only hope, that corps and maybe even army groups will find their way into the game at some point in the future. I think they are really missing.
Same thing with staff officer ranks. Just two ranks are too few!
Anyways, even though that was a bit disapointing I'm still excited for the game, since everything else seems perfect!