When CoH2 was in alpha/early beta, all commander-specific units had to be built from tech structures.
I like this and think it should be changed back,but instead of replacing units,it simply adds the call-in to the building,with the ability to buy said call-in at a certain CP count.
Examples:
Elefant in T4 Heavy Panzer Korps Building,14 CP,230 Fuel
Stug E,T3 building.
US,M10 in Captain building,7 cp
Bulldozer Sherm,Major Building,10 CP
Assault Engineers,T0 Building,0 cp,very quick build time compared to riflemen instead of instant callin.
Guards,T1 building,Shocks,T2 Building. Both at 2cp. KV8,T3. Kv1,T4.
OKW can continue to spawn falls in buildings instantly,
JLI same as fallschrims. fusiliers come out of Med halftruck,all at 3 CP
Ostwind,from Mechanized HQ.
T34/85,T3 building.