From Fedora Project Wiki
The journal is a great (I like the per-unit log view nicely shown in systemctl status foo.service), but it is not an equivalent of a syslog. In your description you seem to underestimate the differences. For instance, journal does not write /var/log/messages or /var/log/secure, which people are used to and which a lot of existing documentation refers to. At the very least, the documentation and the release notes will have to explain the differences better.