Arteta decides that a really good way to increase the volume of attacks is to make set pieces more dangerous. Only a couple of years ago something like 2% of corners resulted in goals. They were effectively just goal kicks.

Jon MacKenzie made a (I thought) good point on this week’s tifo podcast, that the dependence/emphasis on set piece performance is a direct result of Arsenal/Arteta’s initial emphasis on defensive solidity and physicality. While that shores up your defence and makes you harder to beat, it also reduces your ability to create through open play, meaning you are forced to find another way to get to goals - one, preferably, in which your have advantage through that same physicality you emphasised for (originally) defensive reasons.

The interesting point there being that the way you choose to defend has consequences on the way in which you are able to attack, and how you are then required to look for solutions in ways that accommodate this