I am a Barca fan so I'm fairly familiar with last season. Most of the roles are very good, only thing I would change if you really want to be spot on; Jordi bombs down the left in most of the games he plays so I would give him an attack duty, also if you want to go full realism for this Barca played most games with Busquets in a DLP-d where Rakitic is. In more important games the shape looked more like an asymmetric 4-1-3-2 with Busquets as a dm Iniesta on the left (Coutinho in this year), Rakitic and Paulinho as the mezzala. Also if you want to go fully realistic with this Jordi bombs up the flank every single game so I'd give him an attack duty.
Going to shoot up my Barca save see how I can get on