I think changing to an Iron Crescendo style system of battle might fix this problem. At the moment, we have a lot of people that want their soldiers to get play time and 1-2 battles per two weekends isn't cutting it.
Basically we would have 4 battles per weekend: 2 Saturday, 2 Sunday.
One unit or AG from each side "hosts" the battle, like SHD would be main in one, 169th another, 1/GMB another and PzDF in the other (if the German AGs have good setups now, they could keep them and those multiple units would be the main soldiers in their designated battles).
Then we have reinforcements from adjacent army groups bolstering numbers for eachother if they're low on manpower. Everyone would get playtime (I think) and there should NEVER be an undermanned battle.