I still think that at least Smyrna should be greek/orthodox, otherwise where did all those greeks from 1914 come from? Emigrated there in later periods?
I could agree on greek/sunii, but this is problematic because today there are very few muslims in Greece (excluding the post 2016 ones):
https://en.wikipedia.org/wiki/Religion_in_Greece
It really confuses me: if many greeks converted to islam, what happened to them later? Converted back again? Aculturated as turks? If they aculturated as turks, then we have yet more reason to believe it should be greek/orthodox since in 1914 there were so many christians in the region.
Besides I'm not sure how they were doing in 1550, probably the data is honest, but 1900s Ottoman data has been proven to be tainted to hide minorities. It also matters the size of the regions measured, they comprise multiple eu4 provinces.