They over compensated because the plugs now have almost a 2 inch thread.
Not really. They’re running one set of heads for both the naturally aspirated and turbo/supercharged versions of their engines and they are running *serious* boost in factory supported configurations. There are factory aftermarket tunes and pulleys for the GT500 that have it knocking on the door of 20psi of boost on the stock assembly. Out of the box, the Ecoboost 3.5s can run 18psi.
Better safe than sorry and even with the big boost they run, they are *not* having plug ejection any more.