There are two things that frustrate me with Firmino; his finishing and moments of laziness/complacency that mean he either misplaces passes, mis-controls or similar. We've seen examples of the latter throughout his time at the club, and another was yesterday when he had a simple ball to put Lallana in down the right channel in first half. He over-hit the pass and the chance to build the attack was gone. I don't need to go into the examples of his finishing.
It's a real, real shame, as the rest of his game is as good as it gets. Work-rate, awareness of team-mates, close control/touches, creativity, skill, you name it, he has it. He needs to become more ruthless/clinical with the chances he gets. Pre-game they showed his goals v games. 19 in 57 precisely 1 in 3. He could easily be on 30. That has to be the aim for him. Achieve it and we have an absolute worldie on our hands.