Just played 5 or so games against a guy I played a ton of FIFA 11 with. Because neither of us are great at dribbling and shit it was really fun. Felt balanced, and more realistic in terms of the pace of the games.
I do agree that it seems like, in general, it takes less skill to be good at attacking than it does to be good at defending, and that imbalance creates a situation where anyone that knows skill moves is going to beat you if you don't. Sure, the answer would be "learn them", but there's nothing satisfying about not being able to tackle a guy has he sidesteps your whole team and walks right to the goal. I'm still not sure how you're supposed to be able to cope with tackling in every situation.
For example: I use RB to have the CPU contain the player, but the CPU will never make a tackle, the only time he'll win the ball is if the opponent fucks up and runs the ball right to him. So you have to switch to the CPU player to try and make a tackle, at which point you lose control of the player you've been controlling and trying to get in a deeper position. And naturally he just runs where he feels. So if you fuck up your tackle, the guy can just run right though.
I mean, maybe I'm playing wrong. That's very likely. I'm certainly getting better at controlling my defense, but there's a lot of occasions where it just feels like the odds are completely stacked against the defender.