Now that it's clearer how to disengage zoom out, with the toggle in the editor header and double-click, let's try introducing zoom out on pattern tab selection as well. Previously, the concern was about inserting patterns within patterns, but now that you can toggle off zoom out right from the header, to insert patterns wherever, I think it's worth exploring this further.

Inserting sections of a site with zoom out engaged is a much better experience than without, as patterns are stacked consistently—not placed within other columns, groups, etc.