An own goal from Bukayo Saka plus a second-half double from Ollie Watkins handed Villa a deserved victory at the Emirates Stadium.
Aubameyang, meanwhile, played on the left flank but struggled to make an impact as he failed to register a shot on goal for the first time in a Premier League game.
Arteta is now facing renewed calls to play Aubameyang through the middle following Alexandre Lacazette’s poor form.
And the Arsenal manager admits he needs to change his system with Arsenal failing to score from open play in their last four Premier League games.
‘A team function is a collective thing that we have to do more,’ said Arteta.
‘We certainly are getting in some situations, but the end product is something we have to improve and about the position and his movement and where we can find him, of course we can talk about is this the right or wrong place for him, but when things were working and he was scoring that debate wasn’t there.
‘What is certain is that with these numbers, scoring this amount of goals is impossible to fight with the top teams so we have to maintain the numbers that we have defensively in our organisation and for sure we have to improve our numbers attacking-wise if we want to be challenging and if you want to be consistent in winning football matches.’
‘You know, [look at] how we can get into better positions in the final third, with certain numbers in the positions that have to be occupied all the time.
‘The same for how we control the transition moments after not finishing that action when the ball leaves that box.
‘Certainly, as you said, we will look at that again and try to modify certain things to try and get better like we always do.’