Jurgen Klopp will have to draw his mappings again because one of his key players is leaving the club, a big threat for them to start declining in performance. Not only Mohammed Salah,  there are other players that will be leaving their perspective clubs and focused on AFCON, some of these players are call up by their country while some doesn't fall favorite. You're pointing out the fact that Liverpool can not survive without the presence of Mohammed Salah? I don't think so because he would be be gone for a while and he will ensure he return back to the club as soon as he's services ends for his country Egypt.