capturing enemy factories

In reality, if a country captures another country's factories, those factories should continue to manufacture the same weapons as before at the same level. For example, if the USSR were to capture a German tank factory, there's no way that factory can start building T-34's or IS-2's immediately. They still be building the same model of Panzer or Tiger as the previous player had researched but any future upgrade would be the next level up Russian tank. Theoretically, the USSR could then build Russian Tigers, take the plans home and build those in their factories. Then Russian tank factories could choose between the Soviet or Axis doctrines. How about that?