This coming from a die-hard Liverpool fan who, despite Mascherano's departure, will be buying a Barca shirt with Mascherano on the back.
Mascherano is a VERY GOOD passer. I have been watching him all of his years at Liverpool and don't be fool by his "tough" playing style. Last year iin the EPL he made more passes than anyone else in the league. Although most of those passers are the result of him taking the ball from an opponent and then quickly giving it to another midfielder, he does do a lot of good passing. Hell, his last play for Liverpool was laying a great little pass to NGog who went on to score.
Despite Mascherano being a defensive midfielder, he is very quick and a good passer. He will flourish even more in all of the space that Barcelona creates I believe.
Sad to see him go.