I'm not a huge fan of the wizards-in-space illustration myself, but it's hardly fair to compare an amateurish original illustration to a technically competent copy of a movie poster. They're different beasts entirely.
I've commented out the link, because the PDF seems to have gone away and the copy of it I have only goes up to chapter 72. I've got email out to its creator asking if he'd like me to host it or transfer the project files so I can keep it up to date.
Ah, I see. That's an artifact of the way I set up the hosting, with hpmor.com being a mirror of www.elsewhere.org/rationality/. RSS autodiscovery works because I added tags for it, but the rss feed itself is currently a static file written whenever the update utility runs, so it can't know which URL a browser is requesting it as. I can fix that, though; give me 15 minutes.
I could just have it cycle through the crystal ball, wizards-in-space, and finger-snapping covers at random. I had switched to the space one because Eliezer seems to prefer it, and authors don't often get to have much of a say about the cover art.
Cover art has been switched out, and credited in the footer. Although now the web host appears to be having network issues. I should move this to my other host.
What kind of clutter are you seeing in the RSS feed? It looks fine and validates to me, but if there's something else I should be doing, it's easy to modify.
Some details: https://www.reddit.com/r/HPMOR/comments/11l25kf/comment/jbgxbeh/