Finney Is Back
Luka Modric
I'm not sure I agree that they changed their style of play. I think that Liverpool have played a 4-3-3 under Klopp pretty much from the start. Coutinho would tend to take the wide forward role on either the left or right side (but mainly on the left) with Firminho through the middle. He would play as an inverted winger in the same way that Mane and Salah do now.They played through Coutinho a lot, with him between strikers and midfield.
Without him they became much more direct and had an extra body in midfield to press and harrass.
IMO they changed quite a bit, and it was a change that made them less interesting to watch (IMO) but more defensively strong throughout the team.