What he just did is worth sending him to play for the reserves or back to Braga on loan.
Ilaix was completely open and that was the logical pass for another goal.
Last league game he scored the winning goal. As a reward Koeman gives him a start in the next game, and he repays his faith with 2 goals. Compare that to Malcom, when he played a good game, was benched for the next month. A little faith from the manager can do wonders for young players.
Good game, but really really should have passed to Ilaix. hope he learns from it.