As for FM, another issue is with the Retain Possession instruction and this is basically an opinion: retain possession TI is not something we would want when playing a possession-based style. Confused ? Well, the TI is what I call a passive instruction because its not meant to build but rather to simply let the time pass, players start pushing the ball to the sidelines, holding the ball onto their feet which eventually will lead to being tackled and loosing possession. Now, if you think about Barca (and I'm talking about the old Pep's Barca) this has nothing to do with their style: they would use a very well supported build game, always passing the ball with low risk, feet to feet, until they would unbalanced the opponent.