Unfortunate. There are so many cool unexplored historical settings. Even games that are sort of set in them barely scrape the surface, like the ass creeds and total wars, which mostly use the setting as a backdrop. And then the new ones are just bad games on top of that, like tw pharaoh, and this.
But they'd rather come up with Original Setting™ DONUTSTEEL about fatewinders and balltwisters and other highly creative pulp fantasy words only prestigious english major minds could conjure up. Why? You have thousands of years of human history to speculate on and explore. But most historical stuff, not just games, is about ww2 and we wuz romanz. And most historical games are strategies, which, again, mostly use the setting as a backdrop. Cold war (phantom doctrine - kind of sucks, cold war era espionage setting being awesome is its big redeeming quality), bronze age collapse, pike and shot, Chinese warlords era, Russian revolution, Golden Horde conquests, Mesoamerican civilizations, Vikings (expeditions games), Crusades. Loads of settings lacking games, let alone good ones. Look at dominions, how it sources its ~100 nations from myths and legends of various cultures and fiction works. Not historical, but still something interesting that already exists. Now wrap that around any RPG engine. A witcher, a deus ex, a gothic, a jagged alliance, even baldurs gate... I would play the fuck out of that.
I guess it's a huge undertaking + no one gives a fuck about history + there's always political bullshit to deal with when making something like this (I question this argument, because games are perceived as entertainment and the tons of historical games that have been made most likely didn't involve much or any political oversight. there are probably some exceptions).
This goes to show just how unique KCD is.