I had the idea of a Veterancy system for the Ostheer a little like the PE one, only that the units can choose a weapon upgrade for each Veterancy Level they gain. For Example: a Volksgreanadier squad reaches vet. 1 now they can choose like 2 fg42 or 2 mp 44, vet. 2 now they can choose between 1stg44 and a Panzerfaust (only usable via ability), vet 3 choose between light mg42 and schreck.
Like this all Troops could be upgraded there only have to be done some stuff that could be able to add.