the European league does not contain weak clubs. everything has changed, those who performed well last season so can enter the Champions League round. but because they made mistakes at the start of the season, and lost a lot of matches they couldn't compete with other European clubs in the champions league.
the meeting between Barcelona and United is a hot match. I want to watch it. United is doing pretty well at the moment. but I want to see Barcelona take the lead in this fight.
At the moment, the weakest teams in the Europa League are Midtjylland and Sevilla (quite ironically, the multiple winner of this tournament this season among the outsiders), the rest of the clubs are strong and some pairs are indistinguishable from the pairs in the Champions League (especially in the group stage). It is a pity that this tournament has a secondary status and there is no way to fix it, it greatly affects the atmosphere around the games - it is not as tense as in the Champions League.