Arsenal as forwards, but they don't have champions league experience, and I'm convinced that is why they fail whenever they are in the competition. They don't last in the UCL. Artete must address the issue in order to strengthen the team in the UCL next season, because if Arsenal continues to lose in the competition, they will begin to consider how to sack Artete and bring in a new manager, which is why, like Chelsea's president, any clubs that fuck up are sacked and replaced. Even last season, Pochettino tried after the season ended to make Chelsea qualify for the Europa League the next season, But they still sacked him because they spent too much money in transfer windows but didn't achieve anything with him. I believe that is why they told him to leave the team and see how the new coach performs with them, or Chelsea will get the opportunity next season to qualify for the Champions League after the season ends.
The problems of Arsenal in the champion league they always take the league unserious which is why they refuse to win the champion league every season, but is not that they didn't have experience about the champion league Arsenal have alot of experience, because Mikel Arteta is trying his possible best to make the team so strong and address them in right path. But with the way arsenal end the season with better performance I'm having hope for them next season that they can make a positive changes, I think think arsenal can never reason or plan to sack their coach Arteta even thought they didn't win the champion league coming season again; because arsenal coach is a coach that if arsenal mistake lose him or sack him they will regret since Mikel Arteta is doing his work perfectly.
Do you mean that Chelsea can get the opportunity to qualify for the champions league next season? I will know say that it will be difficult for them since everything is possible in football, but with the currently performance of Chelsea I don't think they can make that happen because even this season Chelsea performance look very poor in every league they participated.