Xabi Alonso really needs to fix this before the season starts. There was something wrong with the strategy he employed in yesterday's match. And the team chemistry wasn't good either. Poor teamwork will only result in poor play. Even if a team is filled with many star players, without good teamwork, it won't change the situation or make the team better.
Exactly, the competition ahead will be very tough, not only in La Liga, where Barcelona has a very solid squad and coach. But the competition in the UCL is also very tough, with PSG as champions this season and several top clubs now forming even stronger clubs.
So, indeed, Xabi must be able to fix this and find a more appropriate approach, not speculation that could be detrimental in decisive matches.
I read an interview with Luis Enrique regarding his response to Xabi, and here it is: