Although Arteta managed to improve the quality and performance of Arsenal, but I think Arsenal did not make the Champion League the main goal. Because anyway, sofar it looks like Arsenal are only focusing on being able to compete well in the race for the Premier League trophy and in fact, other tournaments in domestic competitions are also not very good for Arsenal. Therefore,I consider Arsenal to have the main goal of getting good results only in the Premier League and not having maximum efforts for other competitions.
After all, if it's about the Champion League then of course Arsenal are still very far away from being able to compete to the final match. After all,the competing teams in the Champion League are certainly more difficult, moreover Arsenal also do not have a good squad depth for second-tier players. Thus, it will be very difficult to make player rotations to be able to maintain consistency throughout the season.
We all know that reaching Champions League is another level. It would take so much effort, training, resources, coaching before a certain team can compete on this level and emerge as runners-up or the winner itself. However, it is not impossible to do so. Hard work and perseverance are just couple of vital traits that a Team can have in order to achieve such level.
Arsenal for me has a long way to go to get that coveted Champions League trophy. Based from their history, their best finish was in 2006 in the runners-up category. And this year, they managed to reach the quarter-finals which was said to be a good performance already. Focusing in the Premier League first may be a good thing for Arsenal, as they can already work on the aspects they need to improve as a team.