One might say what's most important is the three points that they where after and they got it but to me, I feel it should have been filled with goals.
Arsenal led and dominated the game through out and you could see that the visitors were just hanging by slim threads but Arsenal will not take advantage, maybe they played the way they did because of their game to Liverpool on Sunday, just don't know.
Arsenal showed an embarrassing performance despite winning the game with a narrow score. It's all due to the lack of minutes received by players on the bench. It makes them lose their chemistry. It's totally different when they play with their first-choice players. They looked amazing. But many key players got injured. And this is what you got.
I think Arteta should be rolling his subs early in the game. This to ensure all of the players on their benches get the same minutes as what their key players get. They rely too much on their key players. They're lost once they miss them all.