He was arguably the best-performing player on the pitch from either side tonight (alongside Rugani). He certainly outplayed Naingollan, which is no mean achievement. And though I lament his poor finishing, he still positioned himself and made the perfect runs to get those two fantastic chances he had, and forced 2 good saves out of Szczesny, which is more of an attacking contribution than can be said for any of the other far more highly-rated midfielders on the pitch.
Sheer idiocy to suggest he isn't "Juve material" based upon tonight's game. If anything this is great proof that he has it in him to be 4th or 5th option in the mid at a club like Juve, especially if he can gain any degree of consistency with such performances.