The final suited Mané, even down to the fact that Salah went off.
It illustrated the difference between him and Firmino.
Mané is a bit of a solo performer whose weakness is his decision making. His change of pace leaves people for dead and he can go past most defenders with ease.
Firmino is more of a team player - he's developed an understanding with Mo and their intricate interplay is great to watch. Bobby doesn't have much pace though and can't do it all on his own. When Salah went off he faded badly, Lala just couldn't get into the game to work with him. Firmino is the linchpin of that attack, but he needs other quick thinkers to work with.