Not only a striker but I think Arsenal needs a star player or an experienced player who can lift the team's mentality to be able to perform optimally, Arsenal's problem in the last 2 seasons is not only with the players but also things outside of that that cannot be controlled so that Arsenal always struggles at the end of the competition as if they cannot play as usual when under pressure.
They truly need a world-class striker in latest seasons but they have never bought such as consistently goal productive striker for their squad enhancement. In this summer transfer season, and as preparation for a next season, Arsenal truly need to improve this position as their main priority. If they fail to improve their striker position, they will again struggle in Premier League title competition with other clubs in Premier League.
A last season did not show any improvement of Arsenal but they actually declined a lot while they fortunately still managed to finish with a runner-up position. Whether they can get a good striker in this summer will decide their ability to compete for top four and also Premier League title in a new season.
Arsenal issues are always different from many other top clubs as always they are staying into top spots, but sadly things have never been on good level they had few problems under Mikel Arteta which needed to be fixed quickly, but they are having nothing about them. Having quality striker is long term problem, but they fail to bring anyone while other problem is having good depth in squad which give them good consistently performance with rotation is also important because usually they fail to keep things on level due to injuries or having physically problems with players those had not good replacements.
Three seasons three-second spots always dream work but have no trophy is also painful for all which needs to be changed can they break the bearer in this season, or they are going to have same problem it's big question which is looking for good answers.