You're very welcome! This was hardly exhaustive by any means. And there are folks out there who are MUCH more eloquent on the subject than I am.

If you are interested in the subject of race (and the intersection of race and gender in the buffyverse and fandom, perhaps THE place to start is "Origin Stories", a fanvideo made by
glandujakiss but conceived and commissioned as part of a charity auction by
thuviaptarth, eventually posted on YouTube with the tagline "It's Nikki's fucking coat", meant to critique both canon and fandom tendencies to privilege white men at the expense of people of color.

glandujakiss posted their critique and meta notes of the work and I admit that I found the meta more informative than the video itself http://giandujakiss.livejournal.com/365211.html
thuviaptarth posted their own meta notes on the subject http://thuviaptarth.livejournal.com/92385.html

Taken together it's a masterclass in the art of using fandom creativity to interrogate race and gender privilege.