They still need plenty of time to stabilize.
You're right, with the rest of the squad and minimal funding, I think xavi is a great coaching candidate of the future. Xavi has made Barcelona better, if you look at the beginning of the record to date of course you will say the same as me. With a little spending funds Xavi tried to maximize that. Buying Aubameyang is not a bad thing, Xavi certainly already has a plan with him. Maybe if they had a lot of funds they would buy a lot of star players.
In fact, if you look at Xavi at Al Sadd, you can already prove that he actually has quite good quality, but indeed he still has minimal experience in coaching a team. but I do feel that he will be one of the coaches to be reckoned with. but on the other hand, actually coaching Barcelona at this time is also a gamble for Xavi and it will certainly have an impact on his career.
when indeed he can lift barcelona for sure he will be considered a hero once again in barcelona but on the contrary if he fails then he will only be the next koeman