Imho europe needs minor changes, not a complete rework. Also i thought that people meant as reworking italy something like adding 1 province in the north 2 in the middle and 2 in the south, not 6 provinces in the north and 2 more on sicily (with all due respect for that island why shall it have 4 provinces total while the rest of the south would be way less dense? i would add siracusa as a medium-rich province in sicily and one poor province on the southern part of the peninsula) and for the middle i would prefer to see a real urbino as an inner duchy with its real province (not owning ancona in 1444), than a mini province made just for rome... also i would add a province in tuscany (lucca anyone? indipendent till 1799 is enough for u to consider them?) rather than adding more than 1 province in the north. Northern part of italy is already both dense and rich, that's what i'm saying...
Also, actually this is the really important matter... please shut down that mega lombard culture, i can't withstand watching lombard as a culture of sardinia and tuscany, it's also the biggest culture group by base tax, greater than tartar too, so you're not nerfing anything...and i would have split sardinia at least in 2. In 1444 it's true that it was almost completely aragonese (almost... the northern part was genoese, castelsardo, also called casteldoria because it was owned by doria family was lost in 1448) but if we want to follow eu rules the kingdom of arborea should still own its cores there since it was conquered during the preceding century. So it's just your choice, but please at least consider to rework the mega culture group because sardinia at that time was already more catalan than lombard (also because it's never been lombard?)....
And my 2 cents for the balkans, i'm not against a rework of that region, but the example posted... way too much dense...