I think a lot of that will depend on the manager. Will he keep his job? Not sure. Either way teams without European football struggle.
I’d be very happy to start next season with our current line up (including Lingard!), but will be surprised if we manage that.
Nothing I have read suggested that Arsenal wish to part ways with Mikel Arteta; I'd imagine that he is secure until at least the middle of the coming season.
Besides, Arsenal are not a club that readily discards managers at will.
Re European football, while I know that it generates revenue, unless one actually wins - for example - the Europa Cup, to my mind, it is a complete waste of time and resources.
Personally, I would have been happier if Arsenal had not qualified for the Europa Cup this past season, but had focussed on team building, instead.
However, I will take solace from five consecutive PL victories, and paradoxically, I think that Arsenal may do better next season.
While Leicester have been beset with a large number of injuries, their collapse at the end of the season is similar - unfortunately - to what happened last season. However, they did win the FA Cup - I'm delighted about that - and, this is still an impressive achievement for them.
Re Liverpool, the injury to van Dijk was catastrophic for their season, but, with luck, he should be restored to them next season.
Manchester City have a superb team and bottomless resources, while, under OGS, Manchester United seem (finally) to be crafting some semblance of what looks to be turning into a rather good team (rather than a disjointed collection of gifted individuals, who cannot play as a collective team).
Spurs will miss Harry Kane, once he engineers his departure (probably to Manchester City) and, for all of their talent, it is worth noting that the current Spurs team haven't (yet) won any silverware, of any description, or, for that matter, any titles.
West Ham had an excellent season, while Chelsea, are still less than the sum of their expensive yet talented, parts, but are set to improve.