We might have seen him in action here last season had Klopp never left.
If we intended to play Wirtz in Firmino role, then we shouldn’t have bought Isak after buying Ekitike - should have bought a winger. Note that we only used the Wirtz-Isak-Ekitike trio once (the Inter match).
We looked no better without Wirtz because our wings have been crippled. A hypothetical Barcola/Kvaraskhelia/Diaz-Ekitike-Salah front three would have been much more devastating.