Well yeah actually changing the permissions isn't the best, but it's easily possible to make them ignored IOS-side. Mounting is a decent point I guess, but couldn't you also do that from coreinit's built-in FSA commands anyhow? I just feel like if the purpose is nicer PPC applications, it would be easier to use what's already existing rather than adding another library to deal with is all. At least with RPX homebrew I'd much rather avoid relying on a /dev device which might not be implemented everywhere.