The comments, so far, seem to perceive this change as negative. I, myself, think it is something really good for the overall innovation int the FOSS ecology to have a distro comited to testing new features.
That said, a savvy sysadmin would be picky about the filesystem to use in production anyway and could easily use a non-default filesystem.
Fedora is for the desktop users, it is used to test new features, and what RH finds interesting, they add it to their server oriented distro, Red Hat Linux.
So, the fact that Fedora is not server oriented is by design.