I got a response to my ticket. I get the feeling that reverting isn’t automated, or even functional. They manually changed it back, which consists of two commands (now that I know):
chgrp pgXXXXXX . (this changes it back to your default group, or whichever one you want)
chmod o+X (not necessary, but that’s how it looked)
You can’t change the group to “adm,” to regain Enhanced Security, but at least you can do that via the panel.