It’s a manager who went into a squad of players, realised they were struggling in the attacking third so changed the system to create overloads.
How we long for something similar instead of 4231 every week.
We long for anyone who thinks hard enough about the game to realize how important controlling space is, both in and out of possession.
Formations give us a common language to talk about how we'd set the team up but are ultimately overrated, i.e. there isn't a "best" formation we should aspire to play. The shape of the team should be different depending on the phase of the game (opponent in possession, just gave the ball away, building from the back, possessing ball in final third, etc.).
Well-coached teams find ways to create numerical advantages in most or every phase, with or without the ball. Silva mostly has us doing okay without the ball (minus some horrible team shapes when we give the ball away in the final third but that's a feature of most high-pressing teams) but if you look at our build-up patterns, you can pinpoint exactly why we're struggling. Our midfielders are poorly spaced and can't create numerical advantages, which is why every attack we try to build feels so labored and eventually ends in the ball being sprayed out to a fullback or winger.
And that's not even mentioning free kicks and corners, where we have a massive weakness at the back post that's been analyzed in a few places.