Lots of people have been complaining about the level of defensive pressure. I can't comment on how this impacts human v human play, but vs the cpu I have not found it all that bad. Challenging, yes, and I'm not about to pretend that it is perfectly balanced or anything like that, but mostly I wanted to post something on the importance of your first-touch.
I'll also point out that I got my ass handed to me in my last Career Mode, so I'm in no way pretending to be amazing at this.
Now that the game is tighter, particularly in areas close to the CPU's goal, the first-touch becomes crucial in order to work the ball in congested areas (and therefore often crucial for creating chances).
Remember there are three different types of first-touch. The more obvious ones are using just the analog thumbsticks. Use the right to knock the ball out of your feet in a direction (can be handy when used at the correct time but requires a bit of space), or simply tilt the left thumbstick in the direction you want your player to 'carry' his first-touch. Obviously it's very important to recognise the closest defender, anticipate who else might be about to close you down, and direct your touch away from them.
Finally, there's the LT/L2 first-touch. So useful, more than ever. Holding LT with a direction makes your player
trap the ball in that direction, rather than turn to move (left stick on its own). This brings the ball instantly under tighter control, in the same way like the LT dribble does compared to normal un-modified dribble, and you're instantly able to shield the ball against the incoming pressure (if you performed it in the appropriate direction away from that pressure).
Example 1: Albrighton's trap/turn.
YouTube - FIFA11 - Ireland Miss.flv
Carew RT-shields the ball from Kolarov. Note that City have quite high aggression (65 default) and so two midfielders are drawn towards the ball. In the background, Ireland's high attacking work-rate has seen him make an early forward run from his CM position, getting beyond his striker.
Carew lays the ball off to Albrighton, but Johnson and Yaya Toure are in close proximity and closing him down. Any static touch or forward touch here and Albrighton will be dispossessed easily by his heavier opponents. Instead, I hold LT and turn in the opposite direction....
...so Albrighton traps the ball dead and turns his back, denying the possibility of a quick tackle. If I'd used the left stick alone
without LT, he would have turned on the move and probably been swamped by his opponents' greater forward momentum.
Playing to Mancini's high aggression, the left back Kolarov then makes a mistake: he follows the pass. Carew is already on his bike (
not a one-two) and moves into the space behind.
On an un-related note, I wanted to point out the shape of City's midfield here. You would never get midfield shape like that in previous FIFAs, they've improved that this year.
After that, it's a case of shifting the City centre-back out of position with an exchange of passes, and Ireland nearly scores against his old team. D'oh!
Example 2: Strikers protecting the ball.
YouTube - FIFA11 Young Saved.flv
Again, just wanted to point out Newcastle's two banks of four. The LM has dropped deeper in order to fulfill his responsibility of getting goal-side of Albrighton, who has just received a crossfield pass.
Newcastle's RCM (substitute Tiote) has a backwards defensive arrow in their default formation, so he starts to drop into the space between the lines. RM Gosling tucks infield to get goal-side of the abandoned Delph. Tiote's naturally high defensive work-rate means he breaks into a run...
...and so arrives on Carew as the ball does. Again, any static touch or forward touch means he loses the ball.
Down-left on the thumbstick takes Carew smoothly out of the space that Tiote belatedly barrels into. A bit of delicate LT-dribble then protects the ball from Campbell and Coloccini (as,
perhaps, does Newcastle's 45 Aggression being lower than City's).
The pass goes a little behind Agbonlahor, but an LT+down first-touch enables him to trap the ball and get his body between it and the fullback in order to facilitate a lay-off for the incoming Ashley Young, who was left all alone after Gosling had tucked infield. Again, it's a shame I can't finish!
(Btw I like how, at the end of the video, the fullback appeals for a goal-kick as if to claim Kuszczak hadn't tipped the ball over. EDIT: Or maybe offside? Anyway, it's cool

)
Anyway... I just wanted to try and share one reason why I'm quite enjoying the challenge of trying to prize open these tighter CPU defences (even if my success so far is limited, but I'll get there!). Defensive AI was
such a horror show in FIFA10/WC, that this to me is an improvement in many respects, even if the balance is not perfect and I do understand the points made about aggression/physicality/stamina.