Just reading some of the match analysis, not surprised you struggled in the first half when you're forced to change two thirds of your in-form midfield. Can and Coutinho are very different players to Lallana and Wijnaldum, it was always going to be tough to gel from the get go with a change like that.
Sounds like Lallana is absolutely carving at the moment? F365 reckon he made a massive difference when he came on...
The system works better with him in it and Firmino at the point. The three players to benefit most from Klopp coming on board are Lallana, Hendo and Firmino and Adam would be top of those three. Huge work rate, runs good lines and picks out the right passes.