Deco is responsible for deciding which players come to Barça and which ones leave, but, obviously, it's not just his decision. Along with the rest of the board and the coach, the Portuguese makes many significant decisions. Most of them are very important for the team, and everything must be done with great care.
Barça is in a great moment, and the results they are achieving this season are evidence of that. Hansi has landed on his feet in Barcelona, and it has been proven that the board knows very well what they are doing. Unfortunately, Deco hasn't been able to secure a high-level player, and Inter Milan is close to getting ahead.

Deco's management and the rest of the board
Deco arrived at Barça without experience as a sporting director after being a football agent for several years; something that people didn't like. In fact, he has been heavily criticized until the success with the incorporation of the new coach, who is being the key, was seen. Recently, Laporta publicly admitted that the one who bet on Flick from the first moment was precisely the sporting director.
Barça's top officials believed it was time for a change, and Xavi Hernández was left in the past. The Catalan was key in the club's project, but it was considered that his cycle as a leader had come to an end. From that moment, as painful as it is to admit, the club is at a great level.
Hansi Flick has perfectly adapted to Barça's situation and has understood that there are signings that can't be afforded. The German has only requested stars who can join the team and who don't set exaggerated conditions. One of those who seemed secured was Jonathan Tah, but Inter Milan has intervened.
Jonathan Tah, distanced from Barça
Jonathan Tah is an experienced high-level center-back whose contract with his team ends this year. At Bayer Leverkusen, the defender has done great things, a factor that has placed him on the radar of several clubs. Hansi Flick is won over with his play and wants to be able to count on him, but the Italians have approached Tah.