They are missing Jimenez,Jota and even Doherty's attacking output badly,Semedo hasn't been able to do anything in offence.
Neto is decent but doesn't score nearly enough,Silva came for big money but looks to be far from ready if ever and no one else has stepped up,Traore has regressed to his old non-productive self.
Granted they couldn't anticipate losing Jimenez,they need a reliable proven no 9 type and those aren't cheap,or get lucky with one of their young unproven punts they seem to do.
In hindsight Origi could have done well for them this season,their top scorer had 5 so not a high bar to beat.