I think all the Dune talk has exposed why not much has been said about Piers Anthony on venues bigger than this site: Anthony is too obscure an author for people to give a shit about. His popularity peaked decades ago, and I'm willing to bet that his best selling work was his novelization of Total Recall. I know his earlier stuff was published by Del Ray and Tor, but it looks like Open Road Media has been handling his stuff nowadays. I have no idea how big a publishing house they are, but all of their covers look like shit found on a Google search. I imagine that Anthony is not finding much of a new audience for his older work in a post-Harry Potter world (and let's not kid ourselves, new readers would be more likely to go towards Xanath than anything else), and the only people who read his current stuff are probably perverts, too. The only way I can see Anthony's problematic material becoming a mainstream concern is if someone comes forward accusing him of abuse, or if Xanath manages to get a movie/television adaptation. Neither are that likely at this point, though it sounds like Hollywood flirts with A Spell for Chameleon every few years.