The principles underneath
The piece pulls out the real ideas — numerical superiority in the zone that matters, circulating the ball to move defenders rather than just to keep it, the third man to progress while staying protected, defenders positioning to cover two opponents at once, and 'totality,' the view that attack and defense are one connected system. None of these are shapes. They're ways of reading the game.
The lesson for the rest of us
The takeaway that matters to me is that positional play demands intelligent players who perceive relationships — which means if you install the shape without developing the reading, you've got a costume, not a team. So when I borrow from Pep, I don't copy the 3-2-2-3. I steal the principle — move the defenders, find the free man, connect attacking and defending — and I coach the perception that makes it work. Anyone can draw his structure. The class is in the players who understand why.