There's nothing wrong with pointing out the lack of racial diversity in a game.
However, pointing out the lack of racial diversity in a game (which is based on Medieval Europe) is quite different from working out how to insert racial diversity into a game based on Medieval Europe.
Which isn't to say that Medieval Europe didn't have what its inhabitants regarded as different racial groups - but their different groups would all be lumped together as just "white", by modern people. I, personally, can't tell the difference between a German and a Slav, but that difference was considered very significant by a lot of people within living memory.
You could easily just throw in some people with differently coloured skin, but explaining why they have differently coloured skin, creating the lands where they originally came from, and explaining why they're now living in "Europe" - that'd be difficult.
However, pointing out the lack of racial diversity in a game (which is based on Medieval Europe) is quite different from working out how to insert racial diversity into a game based on Medieval Europe.
Which isn't to say that Medieval Europe didn't have what its inhabitants regarded as different racial groups - but their different groups would all be lumped together as just "white", by modern people. I, personally, can't tell the difference between a German and a Slav, but that difference was considered very significant by a lot of people within living memory.
You could easily just throw in some people with differently coloured skin, but explaining why they have differently coloured skin, creating the lands where they originally came from, and explaining why they're now living in "Europe" - that'd be difficult.