Package Wish List
All the packages in Fedora that are not already in EPEL are wished for in EPEL. The maintainers may not be able to get a Fedora package in EPEL due to missing dependencies, or because the package is not stable enough for EPEL, but otherwise the road to EPEL should be the inclusion in Fedora. The best to get a package in EPEL is therefore to add the package in wishlist for Fedora.
It is possible to have packages only in EPEL, for example if the functionality has already been merged in a more recent package in Fedora, but it should be exceptional.