Okay, I played it a bit, and I see a lot of potential. I think there a a few things that could be changed, though.
First, some of the Ottoman names are a bit off. "Athen" should be "Atina", "Saloniki" should be "Salonica", and Istanbul wasn't named that until the 20th century (though I'm sure you already knew that). A more accurate name for the time would be Constantinople, or the Turkish version, Konstantinyye.
Second, Port Royal was technically a French colony at the time, but I can see why you gave it to Scotland (Nova Scotia
)
Third, FLAVOR! By which I mean Ethnic Citystyles. It would really add to the experience and make it look more professional!
Last, add some custom leaderheads. In the game I played, they were all reused leaderheads, which is perfectly fine, but in a mod it looks better if it has custom ones.
I'm mainly making all these suggestions because I can't mod for crap
But anyway, there's my two cents.