In fact, if we look at these differences, they can be overcome with Diaz, Jota and Salah. But they also added new ammunition, namely Nunez, who is indeed talented in the front line and obviously this is something good for them so I think that even though Mane's role is still a little lacking there, but with Diaz, Nunez and Salah in the front line, this will make things better. The void left by Mane will be filled again.
Liverpool previously had 5 strikers who were indeed quite productive in their front line so far, with the arrival of Nunez of course it can be ascertained that their current stock of strikers is quite abundant, indeed Mane is rumored to be leaving but so far he is still Liverpool property and if he is still there in Liverpool next season, automatically their have 6 attackers next season, I'm quite curious how later Klopp can manage these 6 main players to fill their line up next season, because after all they are great players and maybe Klopp will be quite dizzy to think about and choose who is the best from them 
.No need to wonder how Klopp manages Liverpool 6 strikers, if Mane fails to move to another club, Liverpool will take the middle ground for the good of the players. Loaning strikers to other clubs is a good option to reduce the club burden of paying player salaries. The striker quality that Liverpool have is still at a high level, I think other clubs will be willing to accommodate a Liverpool striker even if his loan period is only one season.