I have no modding skills whatsoever so I have no plans on making this mod but I thought I'd put up my idea anyway.

I'd like a mod that changes the units you gain from liberated countries to their own line. As it is now you will get same looking line infantry units from every country. It would be so cool if you could for example liberate scotland and get two units of scots with kilts and everything but you faction colour. Like the way Napoleons Polish lancers look different than normal lancers. Somebody has probablly already thought of this and I hope it's possible to do so someone will make it!