Arsenal fans should just stop thinking that Arsenal will be at another level next season, I don’t see arsenal winning the league title next season, first of all, I want to ask, did Manchester City lose any of their players? Or did Manchester City sell out some players? I don’t see Manchester City selling out any of their key players and if Manchester City players are complete and no one was injured before the beginning of the season Manchester City will still win the premier league title, Manchester City squad is complete and no position that The team lacks and that is the first thing we should be thinking of before assuming that arsenal will win the title next season.
Arsenal has a good squad also but the squad doesn’t know how to get a well work done when it comes to winning the league, Arsenal has been making the same mistakes for more than 2 years now by allowing a small team to defeat them and give Manchester City a chance of winning the league, I don’t expect arsenal to win premier league title next season, they can win another trophy but you see the champion league and premier league title arsenal cannot win it with that squad they have currently.
As for me, based on Arsenal's performances this season, if I should judge next season based on that, it is sure that Arsenal still has a great opportunity to win the Premier League trophy. Not winning it on the first attempt and second attempt doesn't mean that is how they will continue. There is improvement in Arsenal between last season and this season. It is not how they performed last season that they performed this season. If we consider that, with the type of coach they have, there are probability high chances for Arsenal to win next season.
See for example Manchester City failed many times before winning the Champions League. Despite their great form all those seasons, they failed both in the semi-final and final. So, I don't think you should conclude easily that Arsenal will not win next season's Premier League. In fact, the league has not yet started, so there is not good enough proof yet to predict their next season's matches. It is possible that even many teams that performed poorly this season may improve, and probably those teams that performed great this season may not perform well next season. It will be better for the season to start before judging the team likely to win the league