Was this not tested before release? The CUPS service (used for printing) hangs for 90 seconds, causing a shutdown to take a very long time.
You can Disable and Stop the service with this command:
sudo systemctl disable cups-browsed.service; systemctl stop cups-browsed.service
You should get output like this:
Synchronizing state of cups-browsed.service with SysV init with /lib/systemd/systemd-sysv-install... Executing /lib/systemd/systemd-sysv-install disable cups-browsed insserv: warning: current start runlevel(s) (empty) of script `cups-browsed' overrides LSB defaults (2 3 4 5). insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `cups-browsed' overrides LSB defaults (0 1 6).
Shutdowns should be a lot quicker, now.