One great one, courtesy @happyboy1:

"The midfield is one of the problems, going for Arthur Melo wasn’t a smart idea, even if he wasn't injured, he won't add much to the team.

If klopp continues with attacking through the wings alone, teams will continue to nullify their attack. Arnold is left exposed when the player in front of him (Salah) isn't playing well.

Reinforcing the midfield reduces the workload off the wingers and creativity can come from both the midfield and the wings rather than just the flanks alone. And the defense is less exposed than it is currently."