I wouldn't change anything. Once the device ears sandwich the plastic it will be stronger on pullout.
I believe he's saying do not remove the device ears... quite contradictory to his opening statement to not change anything, but I believe he was referencing the box mounting only.What ears ?
From the looks of the picture they are removed.
Jap>
PS: Not removing device ears would require the mounting screw to go through device ears, the plastic, and the box ears. That could present a problem when changing out a receptacle for future maintenance.