I am sure Barcelona will win easily in the next game. Their team is now one of the favorites in the tournament.
I'm in the same ship as other Barcelona fans hoping to win at Mallorca. Of course I'm not worried about Barcelona's performance maybe missing a few players, Xavi can definitely cope with that with a number of other players.
However, Barcelona may face some problems in the El Clasico match. Because some of their players are already injured. Those who always play in the starting eleven and their roles are much bigger. If they can't overcome injuries before El Clasico, I think Barca will be in a bit of trouble.
In the post you quoted, I said Barcelona have enough players to navigate this competition well. This player is expected to be able to contribute well to his team although they seem to be played less often if the main players are not absent. Araujo who is reportedly seriously injured will be replaced by another defender, it is possible that Pique will return to the field to help with defense during Araujo's absence.