To be honest i am growing tired of this Barcelona's ideology of always wanting to bring former players to the club. I think they should scrap this process. That's why some teams don't perform well.
They are obsessed with their success in the past. They forget some important points. Tiki-taka were broken by their opponents and their ex-legendary players like Xavi would be obsessed with tiki-taka too. Will Xavi be able to help Barcelona get success with a Xavi-taka?
It is challenging for him and the player resource in Barcelona now is not too good. If they hire Xavi, they will have to sacrifice a few seasons, it is a cost. Barcelona are unsure on what they should do. Trying a new tactic, new coach or bind with tiki-taka.
At the moment Barcelona needs a more experience coach to handle the pressure and build the young squad. Xavi is good for Barcelona but I will say not in their current state.
They want to save money and want some old players return to the club. They want a coach that can help fans have more sympathy if the club has bad results. Koeman is their ex-player but he belongs to a very far generation and I am sure many Barcelona fans now did not watch Koeman contributions for Barcelona in 1990s.