First of all, that's very fast of you already wanting to dash the trophy to Manchester united, if anything first united should try to sort out their coaching and playing well problem before even thinking about getting their hands on the Europa league trophy because there are a whole of good teams and also teams from the champions league will also grace the competition with their presence after the group stages.
Manchester United performed better in the English Premier League last season than this season due to which they played in the Champions League tournament last season. Due to Manchester United's poor performance in the Premier League this season, they will play in the Europa League next season. Europa League teams are generally easier opponents for the big teams than teams in the Champions League. Manchester United are certainly a big team in the Europa League tournament but they should work on the issues they have very quickly so that they don't have to finish badly in the Europa League next season at least. As the former manager will take charge of Manchester United, he should be more responsible and change his tactics.