1. I am, for something this important.
2. Item one has to take precedence, you have to have possession of the ball on get two feet down. Now you can do that while falling, but if you are falling you have to maintain possession through contacting the ground. Unless you can interrupt the fall and perform a lunge. Which is the only act they refer to in the case plays.
3. The c part is the point of contention. From the rule book, acts common to the game are (i.e., maintaining control long enough to pitch it, pass it, advance with it, or avoid or ward off an opponent, etc.). Honestly, a player in mid air can maintain control long enough to do some of those things before they even hit the ground. Does that mean they become a runner while still in the air? They can pitch it or pass it and are almost always advancing it. All while not even touching the ground. That just makes no sense.
4. I'm fixated on it because you brought up the case plays. The case plays only talk about some time element and then a lunge. Why didn't they at least have one example of a player going to the ground, does some "time" element thing and then some OTHER act common to the game? Like pitch the ball. Because you can pitch the ball while in mid air. You can't lunge while in mid air. And they should have that as an act common to the game. Lunging is certainly an act that runners do. But you have to be a runner first. That's why they say that the lunge is not part of the process. This time thing or falling interruption completes the process of the catch, but only if they can perform the lunge.
5. But it is a special thing. Its only something that you can do if you have some sort of balance. It clearly is something that you can not do while in mid air. You could throw the ball, or pitch the ball, clearly advance the ball or even possibly ward off a defender - all while flying through the air. But lunge you can not do. That is why they specifically added the lunge part, but then did not include it as part of the catch process. Its the time/balance/interruption piece that does that.
6. IMO he was clearly falling. If this all comes down to you not thinking he was falling then so be it. But then why all the debating. Would have saved a few hundred pages of debate. Just say "I don't think he was falling". At least then the points you are debating are relevant. You can then say that the steps he took made him a runner. Or that the steps, plus the lunge made him one. Or that the steps, plus the lunge plus the reach made him one. But I don't know how you can realistically say that when he had two feet down that he wasn't falling.