To answer your other incorrect assertion, distraction free primarily refers notifications and notifications don't require you to access the overview. You just move the cursor to the bottom (pressure sensitive) or press system + m key (acts as a toggle in GNOME 3.8). Also I use dash as a dock and don't access the overview for that. I rarely use overview at all. I never have heard any GNOME designers treat it as the primary design element and I even attended one of the earliest talks about it in person.