In September 2021, I felt comfortable releasing elfeed-score “1.0”, implying a certain level of stability (and notably will respect semver going forward). I’ve sketched some thoughts on elfeed-score’s future in the README.
Bugs & feature requests are welcome in the Issues section of the project.
If you’d like to hack on elfeed-score, I’ve started a Wiki for that and am always happy to discuss PRs.
Finally, you can just reach out directly at sp1ff@pobox.com, or shoot a webmention to me at my web site.