I'm sure Man United will develop much more under coach Erik Ten Hag. the battle between Barcelona and Manchester United still leaves time, at least Man United will prepare their troops to face Barcelona in the playoffs later. and I think Barcelona will do the same. So, let's see how these two teams develop when they play their matches in the domestic league.
Both Ten Hag and Xavi are building their squads to win the Europa League title. They still have enough time to remove the weaknesses within the party and strengthen the party. But if the players are not able to consistently perform well, the team's problems will not be solved. However, both teams have strong squads. And they have a lot of talented star players. As their performance is not consistent, no definite prediction can be made about this match.
The way Manchester United is becoming tough makes me feel as if it won't be possible for Barcelona to defeat them. Ten Hag is really strengthening Manchester United. I feel Manchester United is more stronger than Barcelona, Manchester United is very tough in defence which can be a problem for Barcelona.