It also shows that Xavi is thinking defensively first in match closeout situations. Cant argue too much against that with 10 men, but in theory Puig could have found more outlets to Depay and Abde to counter.
But would Puig have achieved that if at that moment the rest of the team had stopped running?
It makes me think.. he spoke when he became manager about how the 60-70min dropoff was just psychological, how Barca should defend with the ball etc and that he'll easily fix it. But he is doing exactly the same things that caused that issue.
He is starting a bunch of old players, making defensive subs and telling the team to sit back after we gain a lead (despite his proclamations to the contrary, we have seen that every time we get a lead now, it is clear the players are interpreting his instructions in that way at the moment). It's evidently clear why we have that 70min dropoff and despite all he said about how he knows the issue he is doing the exact things that lead to it.
As it regards to Puig, despite not being the biggest fan, he was good against Mallorca and assisted with moving the ball. Against a Granada who like to sit back he could add some energy and try and break the lines. After 10 men, maybe no, but he should have made a change earlier had it been Sanz or Puig as midfield was ineffective all game.