Europa League is always unpredictable in the beginning and it's only at the last quarter of the season that you will be able to have a glimpse of which club will make it to the finals. Tottenham was the least expected last season to win the league because of their poor performance in their domestic league. Fortunately, they were able to win it despite their poor form. Let's not be fast to decide who will win the league next season.
Just like last season the expectations where high on the bigger team jut like it was two seasons ago that these teams were even seen as favourite for the trophy but in th end the least expected team happened to win the trophy, so it is always better not to jump into conclusions about a team probably because of their initial performance or their known strength and depth. A team can actually be performing poorly in their domestic league only to do even better in the europa and sometimes it is possible these teams may just be lucky and push up there and then you find them almost winning the trophy maybe because they have put in all their energy that due to their expectations from there.
The teams that performed well in the last season of the European League but could not qualify for the final will try to do better this season and the maximum number of teams that played in the European League last season will play in the European League next season, so it is expected that the competition will be quite good. Although Manchester United did not buy a significant player, they sold an important player in their team, if Manchester United does not bring a new player to their club instead of this player, then the team's performance may be bad and if Manchester United's performance is bad, another team may take their position. I think Juventus can do well in the next season's European League and Manchester United may end the season with a relatively poor performance.