Coach Ilike the idea of additional AA Germans.
Here is what I would like to see.
Luftwaffe: FW Condor for long range recon and Heavy bomber.
ME 262 jet Fighter.
Medium Bomber HE-111 primary med bomber.
Artillery: 105mm and 150mm towed artillery back bone of german artillery regiments.
No more 88mm.
Heavy Artillery 170mm or 210mm guns
If you want to do a heavy tech artillery go for a K5 Railroad gun like Robert and Leopold the ANZIO sisters.
Anti-Tank guns: PAK 75mm or PAK 50mm
SPG AT Marder II or III
SDKZ 7s and 11s for PZ DV, and PZ GRN DV, Horse and cassion for INF and Volk DVs.
Armoured car PUMA you can really distinguish a PUMA on the board.
I like the Scharnhorst for a BC.
If you want a tech BB go for the H39-H44
Cheers