Man, I really understand your love for your motherland and maybe a province or two for Portugal would be actually cool, but if I had to follow you I would need to add 20 provinces to Poland - and I don't wanna that because I know some freakin basics of game modding/programming and you can't just satisfy every little nation and every little city in the world.
If such level of detail has been introduced to the entire world (
hey, all nations are equal, you Polish nationalist

) this game would walk slower than Stephen Hawking (sorry Stephen).
Remember Magna Mundi? This magnificent hardcore version of EU, which was epic mod to EU3 and was going to be commercial game? With hella lot of advanced sophisticated mechanics and provinces? It's developing process finished with the complete failure, because guess what, suddenly people realised creating functional and playable video game is more than 'put lot of realistic stuff everywhere'.
I think the entire Europe needs at most 20 - 30 more provinces. No, Paradox won't add home city of every one of us and every micro - nation. Nobody cares.
I would put few more provinces in Iberian Peninsula, Italy, Scandinavia, Ruthenia and Balkans. That's all. Current HRE is barely comprehensible due to the insane amount of factions packd in insanely small provinces.
Honestly, sometimes I would like to make every member of this forum obligated to spend one week learning EU4 modding and basic programming, to make them understand how the games look like inside and why putting 20 000 new provinces and variables would be a horrible idea