The idea of making leaders dependent on provinces has been bandied about many times before, but is usually rejected precisely because of the risk of exploitation. The Turkish player would rush to get Skanderberg from Albania, Austria would rush to capture whichever Prussian province Blucher comes from, etc.
Considering that conquest by a foreign power (even with the same culture) would often radically reorganize the social structure, the idea that Napoleon or Wallenstein would have become great generals no matter what is a stretch. Yes, this would help the German minors some, but it would help Austria more. Not to mention the damage that Spain or Portugal would do with access to parts of each other's lists.
Considering that conquest by a foreign power (even with the same culture) would often radically reorganize the social structure, the idea that Napoleon or Wallenstein would have become great generals no matter what is a stretch. Yes, this would help the German minors some, but it would help Austria more. Not to mention the damage that Spain or Portugal would do with access to parts of each other's lists.