I agree that it was a dull watch, especially for neutrals. I think the reason this makes it more of a "tactical battle" than just a shit game, is of the head to head history. Arsenal's embarrassing 12 straight losses in the league vs City, going back to 2015. Last season, when we led the league for so long and were expected to get something out of our games vs them, they spanked us. Why? Because we tried to go toe to toe with them and play our football. We pressed them and got exposed. Very naive. I don't think we had the squad depth or tactical flexibility to play any other way last season, which is why we ultimately fell short of the title.
Undoubtedly, Arteta had to adjust for this game and looks to have learned from the past. We didn't press as much and sat back, picked our moments when to push. But while it was boring on the ball, off the ball it was an interesting battle. I heard some punditry that this was the fewest chances/shots City had since Pep's arrival, not sure how true that is. I never would have thought that it would be against Arsenal, considering they usually blast several past us. A more specific example of the tactical battle is Raya - after the match Arteta was asked about Raya's mistake in almost getting caught out by Alvarez in the first half. Arteta defended him and said he's asked to play like that and they know the potential risk, especially against the best press in the world. He said he wants the GK to take more time, look up and pick a pass, not just hoof the ball away. The reason is because if Raya just hoofs it long, City will just get the ball back and eventually break you down. We'd just be defending wave after wave of attack and eventually concede. But once we scored, Raya started to hoof it long more. We stopped taking that risk of inviting their press.