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.