Stock units would be more expensive, and less used. I don't think you understand how much fuel investment there is for OKW or Ostheer to acquire said tanks such as Panthers and KT's.
It's better for Allies for the 85's, Ez8's and IS2's to be call in's, as it makes them cheaper.
A OKW Panther is worth as much as an IS2;
Unadjusted: 175 + 80 = 255
Adjusted: (175/.66)+(80/.66)= 386.
If you are gonna keep with this stupid adjustment of prices, at least do it with the right numbers.
OKW base income is equal to any other faction. So a 50-50 map control on a 10 strategic, 2 fuel, 2 muni points gives OKW a 73.1% fuel and 83.3% munition.