Also, remote syslog, which journald doesn't support.
http://www.freedesktop.org/software/systemd/man/systemd-jour...
systemd-journald-remote was added with systemd 212, RHEL and CentOS ship with 208, so no, journald on RHEL7/CentOS7 can not do remote logging.
I also like completely ignoring how journald breaks every log analysis tool.
http://www.freedesktop.org/software/systemd/man/systemd-jour...