The counter argument to this mantra which you have been churning out for months is that when Egan has been found wanting , it has been precisely because he was in a back 3 rather than a 4 .
These have almost always been when an attack has broken down and the wingbacks have been in advanced positions , forcing the other CB’s to go wide to cover possible attacks down the wing .
In such situations , the lone centre back is left vulnerable to to a long ball down the middle when he has to instantly decide whether to go and attack it or stand off and hope for more defensive cover to arrive .
In a well organised back four , that scenario doesn’t arise since one of the twin centre backs is always available as cover if the other one fails to break down the attack .
A classic example of that would be the partnership between Colquhoun and Flynn in which the former would go forward looking to attack the long ball , knowing that if he failed to do so , his mate would there waiting to pick up the pieces .
In describing John Egan as someone who should be ok at Championship level I think you do him a great injustice. In our first year in the PL he showed himself to be comfortably to be in the top dozen in his position imo and even last year , in the crazy formation that lead to none stop pressure on our defence , he came out with his head held high .
Finally , you keep pointing out that his ability to carry the ball out of defence is not the greatest and there is some truth in that . Have you considered that were that not to be the case , he would almost certainly be playing for one of the top six clubs and not for us and with a value way in excess of anything we could afford ?