Lets assess the squad depth
GK: Steven, Neto, (Inaki)
RB: Dest, Mingueza
CB: Pique, Araujo, Garcia, Lenglet, (Umtiti)
LB: Alba, Balde
CDM: Busi, Nico, (Pjanic)
RCM: De Jong, Roberto
LCM: Pedri, Gavi, (Puig)
RW: Dembele, Demir, (Collado)
LW: Ansu, Braithwaite, Coutinho
CF: Depay, Aguero, Luuk De Jong
Left in brackets the players that Koeman probably will not use. Lack of depth at CM is evident. Will probably get some 4-2-3-1 with Coutinho at CAM though. Overall, the squad is strong enough for a comfortable top 4 finish.