Sadly, its not just the grills which bug me. The way the bumper/lower valence is high in the middle and droopy on the sides just irritates the hell out of me. The design puts the visual weight in all the wrong places, and fails to cohere with the rest of the front end. Last generation didn't have this problem, Ranger doesn't have this problem, Raptor and Bronco both look great, I don't know how the F-150 got cursed with it.
Agreed on the interior, though, very nice.