You´re right Hellcrypt, there´s a lot work to do, thought the problem you mentioned its easy to solve right now. You see, the AI its in a early stage but the team strategy is changing considering several game situations, and one of them its the team ball possession.

As you can see in the last pictures because the ball its now in the blue team possession, the blue team changed its state to attack and the grey one to defend, so the players received a message to go to forward positions.

Of course this need to be changed and there is a hard work to do, specially coding the players behavior at three levels: strategic positioning (when the players do not have an active role), ball recovery (trying to obtain the ball possession, intercept...) and ball possession (what they will do if they get the ball under control).