Arsenal's performance was very consistent in the last season as well. And Arsenal's performance has been steady this season as well. But Arsenal coach Arteta should not forget what he did wrong last season. Despite the consistently good performance of the players, the team could not win the title. Because their bench team was weak. When a player was injured, Arteta did not have a suitable replacement. As a result, Arsenal's players failed to maintain consistency. If Arteta makes the same mistake this season, we might get some good performances from Arsenal, but the team won't win the title.
You are right Arsenal's weakness is in the second tier players when Arsenal schedule is tight and one of the players is injured then problems can occur so Arteta needs to focus more on problems like this. This season Arsenal have brought in 3 players Midfielder, Striker and Defender now their strength is almost equal but I'm not sure if the current squad is enough to go through all the games I think Arsenal need a few more players. Arsenal are reportedly planning to bring in a midfielder , Mohammed Kudus is on the list but it looks like Arsenal do not have enough funds.
From the start, this is what Arteta should pay attention to and what Arteta should prioritize. It hurts so much when the trophy is in sight but they don't get it because the substitutes are unable to provide balance when the regulars are injured. I believe Arteta is a manager who likes to learn from mistakes and improve things so that he can get the maximum results at the end of the season. Yes, I see that Arsenal is one of the clubs that is very busy in the transfer market by bringing in several new ammunition that will fill the void to welcome next season which will be very interesting. As you said, Arsenal managed to bring in 3 new players and they spent a lot of money, especially in the Declan Rice deal from West Ham which is estimated to cost 116 million euros. It turns out that these three players are still not enough for Arteta, it seems that Arsenal really want the best for next season so they are willing to spend a lot of money to improve the performance of their squad.
With finances now starting to weaken, I think it will be difficult for Arteta to bring in Mohammed Kudus as additional ammunition for his squad, because the 22-year-old player has very good qualities and one of his strengths is being able to play in various positions. If indeed Arsenal are still insistent on getting the services of Mohammed Kudus, it looks like they will have to sell players first to get additional money.