Simple.
Mendy and Koulibaly have been replaced. Jorginho has been replace.
Hence, defense looking better.
Mount, Gallagher, and Havertz still continue to start in attack.
Hence, attack still shit.
I don't know about you but I don't trust any of our fit midfielders to play in the pivot successfully.
Least the back 5 provides more defensive protection.
De Paul was the box to box aggressor whilst Enzo was the anchor.
When Paredes came on for De Paul, roles reversed. Enzo was then the box to box aggressor. Some of Argentina's best play to unlock a defense came when Enzo was involved.