We probably could have won it in the end, but so could they. A draw against the 5th best team in the league, having been 3-0 down, isn't to be sniffed at I guess. However, Arteta's rotation and team selection for today deserves a lot of questioning. As well as why we started the game so sloppily.
Pepe and Martinelli should have been brought on much earlier. Aubameyang had yet another dreadful game, but he's playing in a position that he's not suited to.
Partey isn't looking like the player we got from Atletico Madrid. However, he's had a tough season with lots of niggling injuries and barely had a consistent run of games. I think, injury permitted, next season is where we'll see the best of him. He needs to stop being so clumsy on the ball and control it better.
Chambers was excellent, and his crossing was consistently very good. Miles better than anything I've seen Bellerin do for us in however many years.
Lacazette had a great game - fair play to him. I still think his recent good form shouldn't be rewarded with a new contract, unless he's willing to accept being a squad player and takes a wage cut (never happening). But at least he's putting in the effort and trying for the team.
Positives: we don't have to stew on a loss for the next two weeks and we're up to 9th in the league

(sarcasm).
Liverpool after the break, followed by Slavia Prague at home. The latter of which is absolutely must win.