I tend to use them

Rifle brigades : mostly as replacements for battered infantry divisions and corps, and for Inf corps building.
Naval brigades : as support unit attached to Inf div / Inf corps to beef them up
Airborne brigades : 1/ airborne assaults 2/ Late-war guard div 3/ support unit as naval ...

Thank you !

summer 1942, clear weather, grand campaign, playing soviet side.
The Luftwaffe is reigning supreme, conducting unopposed AF attacks here and there (although the soviet airbases are full of fighters at 0% miles).
Only air mission that work are
ground attack by long range bombers (DBAD airfields ...

I agree with the original poster.
Counters should be redrawn with a more elegant design, still using NATO symbols. This is not a very costly improvement. I did something like that myself, but my graphic talents are very limited.
My personel request however for WitE 3 is a better Air war system ...