Do as Pughy, Tom and I previously said: stop using the contain button as it makes the AI do weird things to keep possession. Change the buttons so you won't use contain that often and simply walk/run to try and intercept the ball "manually" with a good timed standing/sliding tackle. It makes the game SO much better this way.
In short: configure the buttons like you were used to in FIFA11, "remove" the contain button, and don't fly in to try and intercept the ball but wait for the right moment.
In short, go back to the old style defending. Called legacy i believe.
Tried that and it sure has changed compared to fifa 11. In 11 you could simple press tackle and get the ball 90% of the time. Not so in 12, played 1 game and lost 3-0 because i was defending fifa 11 style.
Now on legacy defending you can use jockey and try to get the ball with a well timed tackle, time in wrong and gone is your opponent on his way to score a goal. Frustrating now but once i get the hang of it i'm pretty sure defending will be very rewarding.