HRE should settle it, they (unfortunately) represent the Teutonic Order more than anybody.
The problem is, the Teutonic Order didn't even start in Old Prussia before 1025 so their stuff flipping to them would still be weird. Another solution would be to exclude Old Prussia from the Polish core so they would have to go to war for it (Tannenberg/Grunwald style).
Königsberg/Memel (the Memel tile should also be Königsberg, imo) is actually historically okay to get flipped from HRE to Poland and then to Prussia. Maybe you should discourage HRE settling it even though, because it never really was part of HRE (first part of Poland, then part of Brandenburg-Prussia. See "king IN prussia" in the early 1700s when Prussia was part of Poland).
Yeah, plus it would bother me to see HRE waste its settlers there for no reason. I agree that the Memel tile could be Königsberg too, especially if the tile east of the Vistula's mouth is considered Gdansk instead.
On this matter, I would strongly suggest of changing one of the Carpathian Peaks to a hill, giving Poland one more tile to work with (maybe the one 1S1E of Krakow).
That'd be better, yes.
Belgrade sounds good, but what about Ragusa? Ragusa was a very important city in that region, something like a second Venice. Or Sarajevo 1N of the copper?
Though I'm fine with Belgrade, too.
I thought of these too, but Belgrade has the advantage of being a fairly prominent city through all of European history.
And by the way, I love this mod even more with the new Civs!
Well, let's see if it all works out
I meant the region until Poland spawn
Poland ought to flip the area no matter who settles it. It is only for about 100 years that will be insignificant. Honestly, who (as a player) cares about a city if they know it is going to flip?
Sure, the question is
a) do we want AI HRE to waste a settler?
b) do we want Poland to flip a free city
Anyway, the Polish UP (if possible) should be changed to in Core/Historical/Contested Areas. It feels pretty insane for me (who does not do very much conquest in RFC if it is not for the UHV to have no problems stability wise (Monarch) taking over Germany, Italy, Greece and splitting Russia with the Mongols and still being Solid. My economy is only at +7, but rising, and my cities, despite all the conquest is only at -3 from excessively whipping Crossbow and Knights (which for this reason I think should be changed back to guilds, Knights+Crossbows in Medieval Europe are completely unstoppable).
Imo, that just shows how broken the stability system with regards to foreign culture is. It's rather nonsensical because foreign culture causes unhappiness, which causes instability, but foreign culture itself causes instability as well. I'm considering to remove the direct stability effect of foreign culture and instead make holding core cities more penalizing, or something.
Now for the Polish UP itself, maybe it's better to limit it to cities where they already have a cultural majority? So there wouldn't be any penalty from foreign culture encroaching on your own cities, but you'd still get it for conquered ones.
That would work, but Poland, not Lithuania, is the civilization. I figure can stay as is though, until we see the UHVs.
Poland covers Lithuania, especially the PLC. It makes more sense that way, because you can justify a larger historical area and more interesting UHVs. Also, [insert Polish nationalism about how Lithuania never had any say in the Commonwealth and totally didn't matter at all].