Suarez showed absolutely nothing when promoted to City's first team squad & looked nothing like a potential Premier League player.
He did ok in the reserves, but nothing more, he rarely lived up to hopes & expectations. Of course some players go up a level later in their careers & can make it elsewhere, but we can't keep everyone just in case they do. He could learn from & be suited to Barca's style. But I very much doubt Suarez will be anything more than a bit part player at Barca, if that.
To some on here though, it seems if a player can tie his own shoelaces & make an occasional pass, he should go straight into City's squad. We can only have so many players.
Most of the midfield players we have now, are performing better than Suarez did imo. Some will get a chance in friendlies & lesser cup games. If they look out of their depth, they will be lucky to get another unless they are very young & promoted ahead of their time. Even if they have a poor game, they should show 'something'. Lopes at 16, looked way better than Suarez at 18, even on a bad day, when struggling.
If Suarez had really looked the part, we would have really pushed the boat out in order to sign him up even put him in the first team squad. He has gone, because he wasn't going to break into our team. Many others will do the same. They won't be shit players, just not good enough or not suited to playing for City.