I think you've oversimplified it somewhat. If he has a 5 yard lead and lays the ball out in front of him on a flat palm as he touches the GL, they would say he had control.
But, what is more complex is that this call was OVERTURNED by "conclusive" video evidence that he lost control BEFORE touching the front of the goal line. If a big curtain blocked everything past the front of the goal line from the cameras, then I say they would NOT overturn this call. I believe they saw the results AFTER crossing the plane and ASSUMED that he lost control before the plane. When in fact, NOTHING after the plane should have any bearing whatsoever.
For example, if after the G/L the ball stuck like super glue to the tips of Pigs fingers and he got up with it still there, then they would have never even replayed it. My argument is that forbidden/tainted "evidence" was used to make a CONCLUSIVE ruling to change the on-field call.