Fistly Pep would of sold De Gea as would of Klopp, In defence both would of change the full backs and centre backs, as would of Poch.
In midfield, all three would of kept Matic, Linguard, Mata,Herrera, would of been bombed out. Rashford would not be playing right wing, (so who would be playing there) Lukaku, would definitely not be leading the line (maybe Poch would be ok with Lukaku), and above all else the high intensity that Pep and Klopp require many of the players would struggle with, and all three would struggle with Pogba in the midfield, Pogba is no De Bruyne or Eriksen.
Mourinho's petulance is a result of wanting addtions, to allow the team to really push on, why did the club not try to offload players, to offset any outlays in purchases. The club could of tried to sell, Jones, Rojo, Herrera, even Mata, and get in a right winger and centre back, why did the club purchase Fred, if they had no intention of selling Herrera and then give Fellani a new contract.