Not sure what the status of this thread is, but RSS feeds still don't seem to be correct. I tried using IFTTT to create an "email me when new post appears" recipe, but their validator doesn't like the feed. Running it through the WC3 validator gets errors:
http://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fpaizo.com%2Fcampaig ns%2FPFSFirstStepsPartIInServiceToLoreTable3%2Fgameplay%26xml%3Datom
Works on some services, but not on others. Sort of a bummer.