Redirecting all application logs to syslog/journald will simplify life for Sys Admins.
Providing structured key:value pair fields to journald would elevate this functionality further.
Apache HTTP Server 2.5 recently added this kind of capability: http://httpd.apache.org/docs/trunk/mod/mod_journald.html
For complex estates with a central Foreman server and multiple smart proxies dotted around the network, it is a huge benefit to be able to pull all log files back to a central point. This would be made very much easier by the relevant applications writing their log files directly to journald.
(blatant copy of Katello ticket: http://projects.theforeman.org/issues/9560 but I wanted to make sure that both sides of the Foreman/Katello coin were covered)