Arsenal finally gave up on getting the Newcastle United striker because their offer was rejected, or in other words, Newcastle didn't want to sell him. I think that the improvement in Isak's quality has attracted a lot of attention, but it's a shame that Arteta's target has failed.
For Eddie, of course he wants to keep Isak together because they have a big target this season to be able to compete again at the top of the standings.
So for the Gunners, of course they want to improve their front line because they need an attacker who can score lots of goals to bring them to victory in every match.