For those whose interest was piqued, its this

The Tactics Board: Why has the 4-3-1-2 disappeared?
The final part of The Athletic's series on football formations takes a close look at the demise of the 4-3-1-2 diamond
FWIW, I dont get the reservation at all about how you’d press from this formation. Almost no pressing approaches have players defending in what approximates their defensive position in paper anyway.
That is pretty consistent with Cox’s point…the issue is less that you cannot press out of a diamond, but more the compactness makes it easier for teams who press you to give you problems.
The diamond also doesn’t work particularly well in an era based on pressing. There’s nothing particularly wrong with the diamond as a pressing shape of its own — the attacking midfielder can push forward to become an extra striker, and you’re pressing with a 4-3-3. Besides, the lateral compactness of the shape can actually be very effective at boxing opponents towards one flank and suffocating their attempts to play through the lines.
But that same compactness can, equally, make it easy for pressing sides to overwhelm the diamond. The distances are short and easy for the opposition to cover. The passing lanes are simple to shut down. There’s no out-ball. The diamond means teams play their way into trouble.