Now I'm thoroughly confused on what you think is a catch. Dobbins didn't even maintain the catch for one step before the ball hit the ground jarring it loose. No way in hell was that a catch and if replay had upheld the call on the field I'd be on here bitching that wasn't a catch.
Dobbins did have possession with a foot down when he crossed the plane. He lost control as he hit the ground. That was why it was ruled incomplete. He didnt maintain control "through the ground." However, if you watch the replay, he clearly had possession of the ball when he was parallel to the ground and his foot touched. In my opinion, as soon as you possess the ball with one foot down, it's a catch. However, the current rules additional elements like "football move" or "through the ground. "