Fair. To my knowledge, there are at least some nonwhite characters in the earlier games so it's not like the entire series is White Supremacist Fantasyland.
But I still think that homogeny in fiction is creatively lazy (unless it serves a narrative point). However, as I said to someone else I had this conversation with, I don't want to instate minimum quotas of diversity or anything (hell, Okami's one of my favourite games and it's pretty damn homogenic). It's not "you need to include X minorities or you're racist", it's "it's fiction, it can be anything you want, why are you making it so homogenic".