When analysing his management style, people need to take into account Arsenal's, and Arteta's history over the past 10+ years.
He was signed as a player on the back of an 8-2 defeat to Utd. He played in a team often seen as a great footballing team but had a soft underbelly, that suffered heavy defeats because the manager was too stubborn to change that...5-1 to Liverpool, 6-0 to Chelsea, 6-3 to City etc.
Then when he left to go to City as coach, he was involved in the setup that used to swat Arsenal away with ease, not only now.at The Etihad, by coming down to The Emirates and completely dominating every aspect of the game including the score sheet.
This continued after Wenger with Emery,.I remember 5-1 at Anfield, 4-1 Vs Chelsea in a Europa League final. So this wasn't just a manager issue any more, this was an inferiority complex that had completely set in at the club.
That didn't even stop when Arteta became manager. I remember 5-0 at The Etihad, 4-0 at Anfield. I think at 1 point we were on a run of 25+ games without a win at a top 6 rival or something ridiculous like that. So something had to change, and had to change drastically, both tactically and mentally, and.its taken time but it has.
We are now on a run where we are 8 or 9 unbeaten at top 6 rivals. It's not pretty at times, but it's at the very least effective. I'm not sure it's even the end point the way Arteta wants us to play, I'm sure he'd lie us to dominate more and get results, but I think it's part of the evolution. And even if we never nget there, it's certainly more fun to as an Arsenal fan to watch us being ultra competitive than just slumping to heavy defeats after defeat.