Thought about some things more.
Basically not Rome got to the Americas. The colonies are older than IRL and will mostly be city states.
It's pretty much anything goes in terms of placing non humans.
North France might be a major hobgoblin Kings perhaps sunset invasion from the Hobgoblins in the west.
Halflings might be Darksun or Eberron ones and be located in the great plains area.
Gnomes probably artificers somewhere. Maybe on an island. Half Orcs might give them the North France lowlands area.
West Europe probably ex elven empire, some kind of independence war in last 50 years.
Fantasy not Mali might be in Brazil, probably reduce the yuan ti to Maya area.
Silver mines in Peru. No Incas. Not sure who I'll stick there.
Thinking of making 19 elven houses using the guilds from Ravnica.
That would change a lot especially for pirates. If Rome got there you would have quite some powerful and entrenched cities and even nations (after all when Rome fell they likely did their own thing) with their own navies to protect stuff. That would make things very difficult for pirates, especially the hollywood type independent pirates. Piracy would mostly be privateering during wartime.
It also means the native americans would likely be more advanced by now as they adapted modern technology (and the gap between them and the Romans was not all that large to begin with).
Another, completely different thing. You might want to avoid it or it might not come up, but how do you intend to handle religion? That was a pretty hot topic in Europe around that time and shaped relations between nations a lot. Of course if Europe stays off map and is only mentioned it might not be an issue.