I can't remember where I read or heard this, but I remember come across some info that Arteta's training sessions are not that intense and that they're heavily geared towards tactics. Watching the games that's exactly how it comes across, we often look like we're playing a training game hence the slow starts and laboured attempts to attack or press.
It would also sort of explain why we looked much more competitive mentally in Arteta's first few months as Emery was always about the intensity.
Does anyone have access to data on distance covered under Arteta vs Emery?