3 players is quite a lot. And do you mean first team, because their squad is quite poor for a top team.Yeah technical ability wise I agree but Liverpool only need 3 players maybe to have the best squad in the world as you say given its in perfect synch to the manager too.
This might sound crazy but there could be a case to be made that Liverpool have one of the worst squad depths out of the 'usual' top6.
GK: Adrian is crap
DF: Decent at CB but then 0 fullbacks
MF: Good depth in Keita/Ox/Lallana/Milner
FWD: Origi and Shaqiri which is terrible compared to City
They still managed to perform when they had some injuries but they didnt lose their front 3 or VVD for a sustained amount of time. They've definately been fortunate with injuries.
Btw this is all 'on paper' because these guys still perform well when relied on under Klopp's system, but some of them would be dross in other teams e.g. Origi as the only goal threat off the bench.