My take on the game:
I think the overthinking stuff is blown a bit out of proportion. I would have preferred Boniface over Adli as well and think his presence upfront improved us but Alonso's plan made sense as well. As
@giorno said, they pin you back but when you win a duel or free yourself from the stranglehold by other means, you immediately have the chance to score. Usually, we are very good at finding solutions in tight areas but yesterday, few players reached the level they displayed in the 51 previous games. Xhaka was inexplicably bad. Had a 2/10 performance when his worst all season was a 6/10. But also Palacios, Adli, Wirtz (in the first half), Frimpong, ...
In the end, I think the match was decided by individual form and not tactical mistakes. Many of our players seemed incredibly nervous while Atalanta was fully focused, Lookman especially. Tough luck but it doesn't spoil an incredible season for me
Atalanta really deserved it and at least we lost to a very good team