Hi Bixer!
Have a look at your team tactic, I am pretty sure that the team your are playing with has "pressure" set to a low value which would explain why your players are dropping quickly after your team loose the ball.
Teams that are pressing high up on the pitch usually have their tactic with high pressure (>55-60) and also often high aggressiveness. But after messing with tactics it seems to me that aggressiveness control more the "urgency" with which the team play that is translated in terms of fifa gameplay as quick cpu build up that gives you those pacy games. On the other end pressure seems to control the height on the pitch at which the team start pressing the opponent.