Actually a good OoB, wouldn't know what to change except for adding more troops everywhere, but then again, I always fell like I don't gave sufficient formations for everything
It'll be great to see whether or not your mix of support brigades among your divisions actually makes itself felt, technically it should be a nasty surprise for the AI once it starts running into AA or AT brigades.
Btw, the Marines and all other naval units would recieve orders either directly from OKM (Oberkommando der Marine = Navy command) as they're part of the navy, or from the OKW (Oberkommando der Wehrmacht = armed forces command). Still wondering what you've got in mind for them.
Generally speaking, the command organisations of the different branches were commanded by the armed forces command and generally speaking, everything with wings on it belonged to the Luftwaffe and everything more than knee deep in water was considered property of the Kriegsmarine. Strangely enough those rules were sometimes twisted a bit, eg the Luftwaffe did field infantry formations. I guess they simply put wings on the uniforms, so they could go ahead with their general rule state above
