I see your point, but on the other hand when your team is tired it’s better to have an extra player in the middle to deal with counterattacks - remember how easy it was to slice through our midfield last season, now we have a bit more insurance maybe somewhat at the expense of penetration/wing play. I think box midfield is like fighting with a shied and long spear - you are relatively protected, but have to be patient to find the right moment to poke the opponent. Having wide attacking fullbacks in a 4-3-3 or similar systems is like cavalry charge with sabers - intimidating for the opposition and spectacular when it works, but also leaving yourself potentially vulnerable unless your defensive transitions are exceptionally strong.