Much much better in the second half last night. We showed the fight that had been lacking all season.
As for line ups, I agree that Guendouzi should be in the team ahead of Xhaka, as long as Torreira is disciplined, then Guendouzi offers far more of an all round game. Xhaka for me is still a liability. He got away with it last night because we won, but there were several incidents that could have cost us due to his lack of awareness, and poor decision making.
In defence, when fit I would choose Chambers and Holding at CB, Bellerin and Tierney, although Kolasinac did well when he came on and it was his run that led to our first goal. Up front we have some great options. Auba has to be first on that team sheet through the middle, and Pepe needs to start. Martinelli was excellent last night, he reminds me of Alexis Sanchez with his work rate, he never gives up and always tracks back when we don't have the ball. The kid is going to be a big big player. The fact that he's keeping Laca out of the team shows how good he is.