So you want the next dragon age game, about the medieval society without air travel, to incorporate every races and type of person on the planet into a single setting. How about we let them tell a great story, and when other lands are involved, cool... it is literally impossible to satisfy everyone on earth.
My race is not featured in DAI. I'd rather see a great story then a completely forgettable story with people all over the earth represented. Honestly, who really cares? If I want stories about my own culture, I have a culture. I'm proud of that culture, I also don't feel they need to create a new race and cram it into the game just because.
The actual middle ages in Europe didn't incorporate every culture because they hadn't met half of them yet. The romans had no idea my culture even existed, neither did the saxons, or the egyptions.
I hardly think DA4 needs a hawaiian or native american cameo to be inclusive. Bioware is the most progressive game company out there, and no game will ever be of sufficient scope to include everyone from every culture. It is impossible, and it also wouldn't make any sense. "hey ferelden court whose never seen an asian man from across the globe, meet 57 new cultures who just happened to develop international travel at the same time".
1) DA4, no. Entertainment, especially video games, in the future? Yes. Change takes time, I know, but it has to start somewhere.
2) If you don't particularly care about what races appear...okay? That's perfectly fine. I'm not going to beat you with a stick. And nothing says racial diversity and good storytelling are mutually exclusive. Changes like these mean using resources differently, not using more of them.
3) Okay, two points regarding "the actual middle ages in Europe".
First: DA does, in fact, involve things that weren't around in Medieval Europe. Magic, for one. Dragons. Cranky gods. Demons.
And second: actual Medieval Europe was no stranger to people from the Middle East, Africa, India, China, etc. People move, trade routes are established, everybody pokes the other guy with swords, throws tomatoes, barter, become friends... I can give you sources if you'd like, but I'm no historian, so you'd do just as well with a google search yourself. Medieval art is a decent marker, though, as are comparisons of craft-style development across continents.
Whether or not your particular culture was known, I obviously can't say. Does it matter? Why is it that demographic accuracy totally necessary, but other kinds of historical inaccuracy are fine?
4) I'm aiming these issues at Bioware precisely because it's a progressive game company. It has a history of thinking critically about the content of its games vs the content of its audience vs society. But "the current best" is not the same as "good as can be".