To me it looks like they are in need of a No. 10 when trying to break down opponents. That's not to say that they should switch from their 4-3-3, which I think is the right formation for them to play considering their squad, but when they are firmly on the front foot in games and pushing the opponent back they need threats on more fronts than the flanks. At the moment their attacking patterns seem quite predictable in creating space on the flanks and whip the ball in. Even though Firmino, Mané, and even Jota, somehow, are decent headers of the ball they'd benefit greatly from having someone who could do quick combination plays through the middle. No idea who this player would be though as they seem quite happy playing their 4-3-3, and as such it might be difficult to be given sufficient time on the pinch to remain happy with the amount of minutes given. I was under the impression that this was Minamino's strength, but for some reason Klopp doesn't seem to quite rate him that much.