Failed 2 seasons in a row and only always finished runner up, there should be a conclusion that can be used as a lesson for Arsenal, and it's appropriate for Arsenal to conduct an evaluation because that way they can make more thorough preparations for next season.
What I see is Arsenal is lacking a goalscorer and the transfer window should be an opportunity for them to overcome that problem. Apart from that, Arsenal hasn't won the Premier League trophy for a long time and I think that can be a motivation and at the same time, it could have been a burden that might affect their mentality (it's something that Arteta should pay attention to).
Arsenal failure to win the championship trophy in two consecutive seasons certainly indicates that something is wrong with Arsenal even though they are in pretty good shape, Arteta has certainly done a pretty good job at Arsenal after he took over the team and next season is certainly an opportunity for Arteta to compete again for the championship trophy, But even though Arsenal is in quite good form, Arsenal still has many shortcomings that must be corrected immediately, especially the front line, Arsenal do have a very dangerous attacking line this season but they cannot continue to rely on the wing line as a scorer for next season, Saka, Martinelli and Trossard have indeed performed quite impressively but they do not have other players as qualified replacements when absent or injury.
In addition to the wingline, Arsenal of course needs a main striker who is able to be a differentiator and mainstay when they face a crucial match later, so far Arsenal has Jesus and Niketiah in the front line but their are still not enough able to answer the high expectations expected by Arteta and Arsenal fans, so I think bringing in a central striker can certainly be a pretty good solution next season.