These packages are a community good, but maintained as a community service.
It's definitely best practice to have a few maintainers but this isn't the venue. One should contact the existing maintainers directly and ask to become a co-maintainer.
Unless the maintainer becomes demonstrably absent it is against policy to interfere in the current maintainers' approach. If a package lacks co-maintainers and/or refuses them, is slow to apply fixes, etc, one should probably fork the package or choose another.
The only real exceptions to this are core packages as under the maintenance of the CLC. Anything else would be a discussion about a massive change in policy.
-davean