How about if troops trained in Capital provences start off better than troops raised in normal provences?
The best troops would be trained in special academies and what not, where as troops raised quickly in war time in outlying provences, conscripts, would be less experienced/well trained and thus would not perform as well.
Perhaps a regular army raised in a capital or a provence with a special academy would come with a 'leader' of somesort, where as a normal army would be as in the original EU, without a 'leader'.
Same for naval vessels.
It could also be historicly linked, say in England there were the royal shipyards in London, but Plymouth came to be known as the main naval base on English soil.
anyways just some ideas.
Has the final version been made yet?