Doing domain mapping is a productivity boost and a time-saver for the team. However since 5.0 we return a page in preview fashion if editor access the site via a domain mapped to it, disallowing her to edit any content right away or switch to AdminCentral with one click.
- map a domain to site
- request the site via its domain
4.5 behavior was to directly display the page too, but being logged in meant for the user to be in edit-mode.
The new page editor is bound to the page app, thus cannot run "standalone".