that being ruled an incomplete pass. Yes, he secured it. But only for a split second. You can technically secure the ball before you secure your bearings relative to the other players around you. And in that split second there's an opportunity for a defender to easily dislodge the ball.

In those situations I get (& support) the judgment that that sorta "fumble" is better interpreted as an incomplete pass.

As I saw it, Kuithe was in the process of making his FB move, rather than having made a FB move.