I see it differently. I hated how open we were under later arsene and emery. Still have nightmares of kdb in center circle with nobody within 25 yards of him. Under arteta we are serious. Timber was SHOUTING at midfielders for being left 1-on-1 against gakpo. These things make a serious team
I'm not advocating that those systems were better than Arteta's. 95% of the time the system is fine. However, there are times the system needs variance as football is not linear. Things can happen against the run of play & the really good teams can find a way to win, to turn 1 point into 3.
That's why we love football mate, goals can happen anytime and for the most random reasons. We lost, but not because of the tactics.