I'm asking myself if we had Kante, Hazard, and Courtois in there today would we have looked better. Yes, we would've looked better in midfield and we would've been harder to play through. Kante in place of Cesc would've made a real difference. Caballero kept the score from being humiliating so Tibo wouldn't have changed anything. Hazard would've pinned Walker back more.
But even with those 3 back Alonso is still a fish out of water in a back 4, Luiz would've still been spanked by Aguero, Morata is still soft as toilet paper, and we have no set 3rd midfielder.
These are things that could've been rectified had we dealt with the managerial situation quickly and were active in the market.