Opps, my bad it is a F-150 not a F-350.
I was most curious about the lack of spoiler coverage over the front tires.
On my 1976 Econoline Van back in 1983 I made a huge chin spoiler. The sheet metal was only so long, and I tapered in inward very much as on the F-150 shown above. I had my reasons, but I have no clue as to what Ford's reasons are.