yet i can visit site.tld/administrator (note: no ?<secret) just fine. I even double and triple checked this with logging out and logging in. /administrator visible like always. So i logged back in and went back to the quick setup. I noticed the secret had CHANGED!
So to be sure i wasn't going crazy i closed it. Went to <site>administrator/index.php?option=com_admintools&view=quickstart and took a note of the secret parameter: it stated "i9OND0Tj". I pressed F5 to refresh, the secret had changed to "mxaVREh6"
Enable IP workarround also seems to reset itself to yes after i changed it to NO as per recommendation by the wizard (afaik i hadn't even enabled it in 3.6.1 because i know it's not).
I'm guessing the setup assistent isn't working the way it should be