I think Lallana would have flourished in the system that included Suarez, I think it suited him to a tee. But I think since we lost Suarez, as with losing any great player, we struggled for cohesion and an identity. Lallana stepped into a team that also immediately lost Sturridge too, take that combined talent away from any side, and most players would struggle.
As for the rest. The declines clearly include Sakho, who I thought looked increasingly erratic on the pitch last season, and was obviously increasingly erratic off it too. Is Stewart really an improvement? He played a bit under Rodgers and a bit under Klopp, neither have trusted him enough to play regularly and he's looked hit and miss for both.
Origi came in off a dreadful season in France, Rodgers did exactly what Klopp is currently doing to his own signing, Grujic (and what he's initially done to Klavan too). He went before he had a chance to start giving him a go. In fact, Klopp only gave him a go because he immediately lost Sturridge and Ings, and then later lost Beneke.
Lucas has finally reached a stage where the manager looks to have had the balls to let go, or at least spell it out to him that he's at best an emergency option, he's looked no better, probably worse in some instances. He's confirmed what most us have said for ages, under Klopp.
And don't give me bollocks about Klopp improving Milner, this is a lad who's just come from City and has been a consistent Premiership performer for years.
Henderson is performing pretty much at the level he was before his major injury. Coutinho has performed this well before, moreso in his first 18 months. Firmino was new to the country and had started to perform under Rodgers, before Klopp took over. He was in the middle of a period of adjustment, so I don't think his case can be argued either way.
Clyne has been hit and miss this season at times.
Lovren is the obvious improvement.