Jo Cook is not the only one who didn't like my experiment with including comment and list archive feeds in the Maia and Electra aggregators. I don't like it either. They're out.
Meanwhile, BMCR has started producing a blog version of their reviews. It puts out a feed that properly handles the pubdate element. I've added that feed to Maia (see earlier comments on the direct BMCR feed). Thanks to Camilla MacKay for the notice.