I know what you mean but Allison and VVD allow them the freedom to go forward at will. They won't be so gung-ho if they have to defend more. Mane is just fantastic. About time he had a slump.they still have their fullbacks. And Mane, Salah and Firminho. It's hard to see them getting dragged down just because of a single player, however important.
Now, if Mane lost his form too, then it would rally hit them hard.