I am a Fedora package maintainer and am considering creating an EPEL branch.
In the guidelines on
http://fedoraproject.org/wiki/EPEL/GuidelinesAndPolicies
under the heading
Some examples of what package updates are fine or not
it appears that package updates should:
1. be backward compatible
2. fix a serious bug
It seems that, once a package is released in EL-n, new features are not
a reason to create a new release of the package in EL-n. An update with
the purpose of adding new features should wait for EL-(n+1) ?