Few changes which may improve this modmod.
1. Georgia has only one ruler, Saakashvili he is quite.. decent while compared to other Georgian rulers such as Tamar the Great, David IV the Builder and Alexander I the Great. As a hero in Georgian culture they could also use David Soslan.
2. Portugal. Currently Henry the Navigator is one of the rulers, meanwhile he never had too much strenght and never tried to acquire more than he needed for his exploration plans. Instead of him you could make Manuel I a new ruler with similar traits. When it comes to Portuguese culture they use Afonso I Henriques as hero unit who is now also a ruler, we may replace him with Henry the Navigator, Sebastião José de Carvalho e Melo also known as The Marquis of Pombal very significant person after the 1755 Lisbon earthquake, Dom Pedro regent of Afonso V, Afonso de Albuquerque who established strong presence of Portugal in Asia or Aníbal Milhais war hero.
3. Currently we have Vatican as Civilization, but it's quite young and tiny state with illusionary political power. I propose to rename it to The Papal States, which lasted for very long time and it could get own culture group (after all Venetia and Sicily have it so I guess we will get more Italian cultures).