@movq@www.uninformativ.de Good question. Tarballs are probably not needed, but might be convenient for people who don’t want to or can use a version control system. Not sure if there are non-techies who use your software. Tarballs for branches are overkill, though, I agree.
Looking at this more closely: As for the feeds, how about filenames “tags.atom” and “commits.atom”? Unless, of course, they were already named like that before.
For the tags feed it would be cool to include the actual changelog entries to be more useful if somebody takes this approach to get notified of new versions. But that would mean you have to duplicate the changelog entry into the annotated tag. And then you can’t fix changelog typos in the feed anymore. Alternatively, the feed generation would need to extract the section from the the CHANGES file. That has the benefit of automatically providing changelogs for past versions in the feed.