The team from Barcelona are already very superior in attack but when talking about defenders or often referred to as their defense players are still weak, this is an important point to add or replace defenders in the transfer market later in January 2023 Xavi must look for defenders with above average skills.
About strengthening the protection and buying new players there sounds quite controversial. On the one hand, of course there are no limits to perfection and Barcelona has a place to grow and strengthen and it is necessary to do this constantly. On the other hand, let's not forget that Barcelona's financial problems have not gone away and there are certain limits to which the club can spend money. As far as I know, the club still owes a certain amount to Messi, and the fact that the leaders of Barcelona have been agreeing for the last few years to postpone the payment of their huge salaries does not mean that these salary debts have been forgiven and will not have to be paid later. Therefore, you still need to be realistic and Javi should be able to manage the resources at his disposal.