We can't judge Barcelona like this, we know Xavi is a great coach but we can't forget that Barcelona has many financial issues and this team couldn't buy the players Xavi needs to have. In fact, even if Xavi is the best coach in the world still he needs better players, I think that's why they lost the El Classico game recently against Real Madrid in La Liga.
I think that people need to stop to use financial issues as excuses. Barcelona has also a good quality of club. It doesn't even make sense to keep say that financial issued as the problem that was preventing barcelona to win the game. Barcelona has not yet paid its transfer fees to the other clubs. No reason to use it as a way to not judge him. In fact, those guys being chosen by xavi itself and barcelona bought them all with all of money.
Who is the guy intitiating lewandowski or even felix to be bought from another club? It's xavi. That's why stop to call him as a best coach in the world. Barcelona does have high quality players on its club.
Some garbage clubs like girona has only a few quality players on its club compared with barcelona but the coach was able changing the club a lot. That being said that when there will be more people to join in the club didn't also guarantee if the club can win the game.
I think that it's a common thing to blame xavi for his fault caused by he has responsibility over his club. This is the main concern for xavi about how to implement a better strategy.
Laporta was making a move based on xavi's request.