A backline of Alba-Lenglet-Umtiti-Mingueza/Dest is scary to imagine going up against Neymar and Mbappe. It could get really ugly. Umtiti-Lenglet have a hard time keeping up with Segunda wingers 1 vs 1. Mbappe easily runs past most Ligue 1 defenders I've seen him against. Neymar, a whole another problem due to his creativity. Midfield and attack has to be on their A game if we are to keep up. FDJ has to put in a shift to run box to box and make sure they don't counter. I have no confidence in Busi doing that.
I think you look at it the wrong way.
Sure Araujo would be good in the 1v1s that will inevitably appear once or twice.
But the key is that Barcelona must keep the ball, lose it in the right places, and win it back when PSG try to get it to the forwards.
Frenkie, Pedri, Griezmann, Dembele, and even Messi are the ones who are scary to me. The midfielders as I think they are a bit too mobile, and the attackers as they lose the ball way too much lately.
Barcelona must make the game be decided on the midfield, as most games are.