The team needs to act decisively during the transfer window. Xabi must take the right steps in this regard; the team is in excellent shape and needs to get even better. He needs to strengthen the squad further by making the right transfers.
If one of the team's key players leaves, they could suffer significant losses. He needs to make the right choices in these critical situations. Otherwise, a team that's performing very well can suddenly become very bad
Real Madrid's squad is quite strong. I do not think there is any require to change much in this squad. There are many talented players in every position, defense, midfield and attack . So real madrid does not need to add new players to the squad.
Now xabi needs to create a stable match strategy. Only if the match strategy is good , madrid's performance will be consistent. However we still do not know how real madrid will perform next season. However xabi Alonso's first task will be to strengthen Real madrid's defense. Only if Madrid's defense is strong, Madrid's overall performance will be strong.