Arsenal squad dept is not that strong that was why they have been surrendering to Manchester City at the last stages of the season for the past two seasons. You cannot compare Manchester City squad dept and that of Arsenal at present. Manchester City has at least two world-class players in every department but same can't be said about Arsenal. Yes Arsenal has good players but if they want to be operating in the level that Manchester City is currently they have to dive into the transfer market and add more fresh legs that are going to provide more competition to the first team squads they have already.
They shouldn't look for players that are willing to settle for the bench. They should get players that are ready to go into the first team immediately, players that are going to make the coach have headache when it come to selecting the match day squad. They need to have a player that's playing at the level of Declan rice in mid field, and same in defense and get rid of Gabriel Jesus because he is lost in the Arsenal team. Arteta need to have a team that he can rotate and keep getting good results without shivering. Only when this is done that's when Arsenal can compete effectively in all competition next season.
Arteta needed a process to bring Arsenal to this stage, in fact they have done it quite well even though City still dominates the Premier League. It's not easy, even other teams that are competitors in the Premier League have had difficulty beating City and even Arsenal in the last two seasons. Well, currently Arsenal's foundations have been built quite solidly, Arteta is only continuing the ambition of the club and team to bring the London cannon to win the Domestic League trophy. Of course, what Arteta did in the transfer window shows that he wants his team to be much more competitive and able to compete closely with Manchester City. Therefore, it was also reported that Arsenal is eyeing several names to fill the center forward position. That doesn't mean G.Jesus isn't better, but Arsenal doesn't have a pure striker who can really be relied on to be a goal getter in their squad.
Well, Arsenal actually has a pretty good squad. However, breaking City's dominance is not easy. Moreover, Pep Guardiola's team is one of the strongest teams in both the Premier League and Champions League. that's why Arteta and Edu are continuing to work in this summer's transfer window. I hope they bring in worthy newcomers, especially strikers who can be relied on as goal scorers.
For the Champions League, I won't speculate much. after all, the competition is still a long way from starting.