Religions map with corrected borders in Central Europe
Whoa, that map is very good! The balkans and India are specially interesting.
You only forgot to paint the italian enclave of Giurrai (OTL Macau). Such enclave, however, was not discussed before, even if it was there already. It goes slightly against some of ours conceptions, as it would be somewhat hard to have italians in the Atlantic with Luso-Mauretanan Gibraltar - except if the iberians allow them to cross it. In this case, early interest for the East Indies (specially Genovese interest) could have gathered them these few ports in the Orient, but not higher colonial ambitions.
Another theory: In the XIXth century (ideally in the XVIIIth, but I don't know how possible it would be), the Italians financed the building of a Suez channel together with <another interested power and the actual owner of the region>. As Gibraltar was "closed" to the Italians, so would be Suez to the Portuguese. The Portuguese, then, traded one indian port and the port of Giurrai for the rights of crossing the Channel, which ended the long commercial dispute between Portugal and the Italian Federation.
Or we could simply give it to another nation (plus the indian port), like Portugal, Angland, Mauretana or Denmark.
(as Venice has two isles in the Spice Islands, their situation has the same problem (and the same possible solutions))