I have some sympathy for this. But I don't think this is a fair comparison to the original OA.
OA is not laden with Sax Rohmer-type tropes or themes. In that way it differs from (say) some CoC material I've seen.
The presentations of various sorts of warriors map onto idealisations found in (some) Japanese and Chinese popular cultural presentations of past/pseudo-historical periods in similar ways to knights, paladins and the like in other FRPGs. Likewise, though perhaps a bit more weakly in some cases (eg Sohei), for other classes.
Reading Sax Rohmer as a non-Asian person, and taking it seriously, will generate racial hatred. Reading OA as a non-Asian person with limited knowledge of Asian culture and history, and taking it seriously, will generate respect for and receptiveness to the culture, the history and the peoples. I think that's a fundamental difference.