let's go back to the scenario actually posted (because of course if we change the scenario we may change the decision)
so a man is receiving and controlling a poor pass --- with his foot in touch.
Now, I completely understand the reading of Law 19 that led ForF to keep his flag down, but I think it's a Jesuitical reading of the Law - that breaches common sense and led to the wrong decision.
When the ball arrives at this outside man he has his foot on the line. The pass goes behind him a bit and he has to control the ball with his inside hand. He does this by "batting the ball up" to himself. He then gathers and scores. As he made contact in batting the ball his foot was on the line
so a man is receiving and controlling a poor pass --- with his foot in touch.
Now, I completely understand the reading of Law 19 that led ForF to keep his flag down, but I think it's a Jesuitical reading of the Law - that breaches common sense and led to the wrong decision.