Hmmm..what might I, the guy with Prussia in his name, have to say here I wonder..?
I will never attempt to hide the fact that I think it would be amazing to raise the flag of Prussia or the German Reich from my ship as I let my cannon send some "aggressive diplomacy" towards the French...or anyone else in the way!
That being said, I see more justification in Portugal being added before any other "left-out" nation. Do I even need to argue that at this point? However, there is also justification for some Germanic representation here, as proven by the evidence of earlier posts. Also of note, I do not see any merit to limiting the Russians to force picking a Scandinavian nation, or a Dutch nation, when Russia is contributing ships towards other national fleets...it makes no sense at all there. If we can represent the ships they built, we should be prepared to represent the nation that built them.
Now, speaking on the "historical" aspect of these posts, allow me to add something that has yet to be said here...those of you wishing to fully immerse yourself in a historical reproduction, you will never get it in a MMO game. The very moment the game allows hundreds, thousands, or more to change the world around you, it no longer becomes historical anyway. If pirates can join together to claim half the ports of the Gulf of Mexico, why not imagine that Russia, Brandenburg/Prussia/Germany, or Italy sensed the grip of the current powers in the region start to weaken and attempted to send fleets to capture ports in the name of their respective empires? Each of these nations had the means and the motivation to set up colonies in the region, and had Britain, Spain, and France not been as strong here (and if Portugal were completely absent from the region), then history may very well have turned into Germanic caribbean, Russian NA, Italian SA, etc.
Please respect this game for what it is. This is NOT a historical movie, to be played out on a grand scale that holds your hand through the age of sail...it is a fully player created and player influence video game set in a world roughly based on the age of sail. Keeping this in mind, I see no reason why Portugal, Russia, Brandenburg, or any other European expansionist empire couldn't appear here.
TL;DR - Portugal should be in the game before any other nation. Germanic people (Brandenburg, Prussia, Germany) have legitimate reason for being in-game. Russia, Germany, Italy, and possibly others have a legit claim (imho) to be in-game based on the impact of piracy that is much worse than history leading to a "weakness" in the region that these other, "lesser" nations would have tried to capitalize on in order to gain a foothold in the New World.