I'm watching from Thailand & lost connectivity several times, esp. towards the end, so didn't see whatever Schuster did or didn't do.
However, I am surprised by negativity of some posters. We beat our arch enemy after all! The last victory against them was by one point in 2019. Sure, we clocked off towards the end, but we smashed their forwards for most of the match. We can do the same thing next time we play them. Also, the shackles came off our attack and the team can now start fully believing in themselves.
That was a great try by Koula against the run of the play, esp. as he had to turn around to catch the ball. However, if Saab received the ball in a similar position, no one would have got near him & he would have scored closer to the posts. IMO, he is substantially faster than Koula. Koula's strength is his speed off the mark.