Heres my idea: There are 3 "tabs" on the factory window, each tab is the same units but different vet levels, and you can upgrade your factory 3 times to unlock the vetted units. Think about the Sturm Armory (For Example), there would be an "upgrade button" on the factory for you to upgrade the troops which are trained from it, so lets say you upgraded the Sturm Armory, itll cost 30 Fuel for vet 1, 50 for vet 2 and 70 for vet 3, and as you tier up the cost for the vet upgrades increase, like the Panzer Command would cost 50 Fuel for vet 1 etc,etc. So if you have a Vet 3 Sturm Armory, the Krieg Barracks will still remain at Vet 0.
Heres a really short brief description of my vet system::
This can work either way, with the buildable (This version of the Ostheer)/buyable (Wehr style) vet or the earned vet (USA):
Vet 1: Unlocks all upgrades for the unit or a specific upgrade
Vet 2: 25-50% More health/20-40% less chance of armor penetration for tanks/Tank upgrades (Extra Armor, MG mounted on top, etc)
Vet 3: Quicker movement speed and accuracy bonus/ 10% health increase. Faster suppression recovery rate/Does not supress as quickly
The better vet results may be too high or too low, but thats always up for debate, I just do NOT agree with the more popular vet system of troops getting just special abilities per vet level.
