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So far they seem to have found a smart way to increase the quality for their team. When they sign some who have an expired contract they can save a lot of money in that way and consolidate their finances. It is not yet known how many players more they are trying to bring to Barcelona, but they will need a few if they want to attack again. But they do need to improve their overall approach since they are in desperate need for a surplus.
The idea is probably the same, as long as they are sure the player fits Barcelona's needs then I think Xavi would recommend the player to sign. Ilkay Gundogan is a good midfielder for Barcelona, so I think Barcelona were lucky to sign him for a few seasons. Xavi may still need a few other good players who can balance his team, but I don't think he will be too pushy due to the team's not-so-good financial condition.
Xavi already has a good alternative to the former Manchester City captain. Ilkay Gundogan can act as a defensive midfielder although De Jong and Kessie can also play in that position. So Xavi has found what he was looking for after he lost Busquets, while in other positions I think Xavi also needs a good right-back instead of giving Araujo and Kounde a lot of chances.