[...] Do I have a specific suggestion for how WotC/Hasbro could make amends?
1) Well, ideally each legacy product which has major "ethnic, racial, or gender prejudice" would be
looked at by a team of professional cultural consultants.
2) And
their findings would be published in a DRAGON+ article. Where WotC would apologize for specific portrayals.
3) It would be such a healing gesture to
bring in the original authors (in this case, Bruce Heard), and editors and artists, and let them apologize on DRAGON+, and say some really beautiful, conciliatory words which are vetted by the cultural amends team. Like
R.A. Salvatore's recent words on problematic aspects of the drow, which I think was a beautiful gesture.
4) The DRAGON+ article would then be forever linked to the DriveThruRPG product page. It would be a truly healing gesture.
[...]
5) Besides educating folks through the amendatory DRAGON+ articles, I'd also suggest that
a large portion of proceeds of problematic legacy PDFs be perpetually donated to an appropriate charity. In the case of GAZ10, I'd personally suggest the Lakota Waldorf School...they could use the money. Yet I'm sure there are plenty of worthy Indigenous American and East Asian charities which WotC could identify, even in the Renton-Seattle area. However, the more specific the better. For example, GAZ10 contains distasteful content specifically related to the Vodun (Voodoo), Lakota (Teton Sioux), Nakota (Assiniboine/Stoney), Kanienʼkehá꞉ka (Mohawk), Apsáalooke (Crow), Mongolian, Tibetan, Chinese, and Bhutanese cultures, and perhaps others. It would not be hard for WotC's cultural amends team to do some web research and find a charity related to each of those cultures. And sort of divvy up the PDF "amends royalties" based on approximately how many distasteful jabs each culture received. (For example, there are only three sentences which buffoonishly refer to Vodun spirituality, but many paragraphs which refer to "Red Orcs.")