I'll admit when he left I was gutted, it felt like the same old story of us selling our best player just as we were about to stake our claim. To be honest though he wasn't really missed, in fact our results slightly improved, although we were lucky that none of Firmino, Mane and Salah suffered any injuries after he left.
There are some theories that Klopp (when agreeing to Coutinhos sale) had in mind that the results wouldn't really be affected but with the funds he could really kick on and improve the squad overall. All hearsay really but that's how it's panned out in the end.