Xavi was a very smart football player and I see now he is a very smart manager. It couldn't have been easy to rally Barcelona, they did it. How did Barcelona get to second place in the league? It happened because Xavi motivated the players with his smart strategies. Now in the summer, I'm sure he will find the best players and put them in the Barcelona jersey.
There is an opinion that the Tiki Taka strategy is outdated and of course it has a certain result, but not above a certain level - roughly speaking, in modern football you cannot claim titles using this strategy. In addition to the coaching problem, Barcelona still have financial problems - I have not heard any news that would say that they were able to somehow settle their huge debt.
Xavi Hernandez as smart manager? Early claimed with Xavi as smart manager without any trophy yet for his season debut with Barcelona. Actually no doubt with Barcelona financial trough he arrived firt time but with many player transfer on January window transfer I think Barcelona should have leaat one trophy as Europe League. But keep smart manager with tiki taka philosophy have old and easy defeated by other team. Maybe if your words true about Xavi as smart manager need waiting with next season how far achievement Barcelona.