I think that you will have to define what you mean by mundane. My biggest complaint with the article is that Rich did not include rural and urban environments. Beyond that complaint, I only have minor quibbles with a specific feature of one or two environmental and, if i wanted mundane (as in non magical), I would omit Mageocracy and Theocracy. (edit: now, if you don't have the environments in your setting, or in your case, you have a specific culture in mind, I can see how his article does not work, but my reply was actually to a specific poster and not your original post specifically).For my purposes, it doesn't solve the "PCs are mundane and they are exploring wonder and horror" aspect.
As for exploring wonder and horror, that to me, is just setting the characters out into the world. However, you might have something else in mind.