Its not about the performance itself, its about how he's progressed recently.
As others have mentioned, he looks much more assured of himself and calmer. He had a very jittery aspect to his play at times last season and to see more composure from him is a good sign in my opinion. I felt bad he missed those sitters, he deserved to get a goal for how he has been playing.
His greatest strengths are his vision, creativity and 1-on-1 dribbling and those are things very much in line with what Lucho wants from the attacking players. While he's looked good on the RW, obviously that is for Messi and I'd like to see him play more through the center.
I think there is a strong case to be made for him being the majority shareholder of Xavi's minutes this season. He can complement either Rakitic or Iniesta and I think he can have a breakout season this year.
Particularly if Pedro leaves, that will increase his chances for time as well.