I do plan on having antagonistic characters. Both internationally and intranationally, for sure. Good old "Ourlandians" as a problem is definitely a part of that.I think you could avoid colonization while still having Bad Guys by having the imperialists be also native to the continent and who have recently developed a desire/need for expansionism. Maybe they recently found or developed substance they want to mine or grow but it's easier, cheaper, or safer for them to get other people to do it and have become slavers. Maybe there was a war, they enslaved the POWs, and have kept on using slaves because it was easy. Or they could be completely inhuman--maybe they're all shapechanging dragons who have decided that building railways and therefore travelers brings in the gold well, and they use their humanoid servitor/slaves/indentured servants behind the scenes to create their own little paradise for said travelers. They could create a very early version of Vegas.
Plus, well, no matter how well integrated a community is, you're still going to have "Our Land for Ourlandonians!" people and "The Ourlandonians are erasing our Newcomer Identities!" people.
In fact I had plans for the majority of druids in the setting to be an antagonistic force for pretty much everyone, native, settler, or imperialist. Very much "Return to the natural order" rather than frittering about as friends to trees or whatever. Nature is harsh and cyclical. Kill or die, y'know?
And I -really- like the idea of Dragons as Robber Barons... especially robber-barons that form the essential backbone of the "Evil Empire". They've long been a strong narrative element of Greed in medieval fantasy. And while they will shapeshift it's not going to be a secretive thing or anything. They'll be Dragons taking on Dragonborn form to get into and out of board meetings or whatever before going back to being dragons and flying off.
Mainly 'cause I don't want it to get antisemitic.
But soulless robber baron dragons is -enticing-... no?
Simple Weapon proficiency instead of Martial.In the real world, sure, guns are probably easier than bows to use, but in a game setting it's still just the same old proficiency bonus.