You can restore the visibility of the shutdown item with a shell extension
sudo yum install gnome-shell-extensions-alternative-status-menu
Then Alt+F2 and type "r" to reload the shell and you new menu will be active
You know you can jus press the "ALT" button with the menu showing or do "ALT+F2" and type "reboot" or "shutdown"
Other good stuff - including pointers to other extensions here: