Negative #1: Mosquera's distribution is suspect

Singling Christhian Mosquera out is extremely harsh and the young Spaniard has made a brilliant start to his career at Arsenal.
On Sunday, Mosquera performed well and was unlucky to be replaced by William Saliba at half-time. Mosquera had largely taken care of business against a counter attacking Newcastle side. Both Nick Woltemade and Anthony Gordon met their match and the only change they got out of Mosquera were through unforced errors.
Twice Mosquera's poor distribution gifted Newcastle the ball in dangerous errors and the young defender really needs to eradicate these from his game. Playing in tight defensive areas against the press is part and parcel of the Arsenal way and accurate distribution is a vital attribute.
Positive #2: Mikel Arteta took the handbrake off

The Arsenal boss has received plenty of criticism for his reluctance to put his faith in Arsenal's attacking players in the big games. He has been accused of wanting not to get beaten more than he wants his side to win. Against Liverpool, the handbrake was on. Same story against Manchester City.
On Sunday we witnessed a different Arteta. Here was a manager who wanted the winner when he could have easily shut up shop and gone home with a point. Replacing Zubimendi with Martin Ødegaard and Riccardo Calafiori with Mikel Merino was a rich statement of attacking intent as Arsenal went in search of first an equaliser and then a winner.
Declan Rice was left as the only holding midfielder and even he was getting forward in the dying moments of the game.
As fate would have it, the two substitutes would be heavily involved in both of Arsenal's goals. First, Merino got the equaliser from Rice's cross. Then, Ødegaard guided a corner onto Gabriel's head for the winner.
Continued on the next slide...