As to the original idea behind diversity within Destiny. This may be why. http://mic.com/articles/87359/national-geographic-concludes-what-americans-will-look-like-in-2050-and-it-s-beautiful I notice that while we may give our characters a general look of racial singularity i.e. the Asian look, it does make sense that humanity had begun to evolve passed its racial nonsense and started to diversify further. Bungie may have recognize this ideal, as our struggle in Destiny is of a unified people and not one particular race over another. Humans are Human, not Black, White, Russian, Asian, Hispanic, etc. We are all one and the only difference within the races is for something other than Human, i.e. Exo and Awoken.