It's a good thing that none of the truly important players had to play in this game, and that few had to even make the trip.
More confirmation that outside of the first 11, you have Ter Stegen, Sergi Roberto and Rafinha as quality alternatives. Of course, Arda is Barca first-11 quality, and I hope Vidal can prove to be valuable. After that, you really have to question whether any of the other players should continue on the team.
It is essential to bring in a forward in January. Not an experiment or someone for the future, someone who can provide acceptable production this season. Maybe an alternative LB is not essential to winning titles this year?
No later than next summer, need to bring in someone new at CB, try to get an upgrade for Pique/Masch alternative better than the current options. Gotta bring in an alternative LB. Then, it would not hurt to ship out the others towards the bottom of this year's squad, bring in fresh blood.