Just had by far my best experiences with the FIFA demo this evening. To grasp some of the new mechanics, I chose to play on the default assisted control settings, and because I hadn't tried it yet, I played on Legendary difficulty.
It was a great run of matches. I now have little concerns over the new defending system - even on Legendary I rarely ceded more than a goal, only a couple times two goals, and once three goals. And attacking was actually a blast - trying to break down the defense in the final third has never been so fun in a FIFA game.
Playing as Barca was the best. For the first time ever in FIFA I was both able to play like Barca and feel like a god when Messi was on the ball.
Some things still have me concerned though, first and foremost is Precision Dribbling. I've found, especially when playing as Barca and especially Messi, Precision Dribbling can be a joy when it works. The problem I'm having is that Precision Dribbling rarely works for me when I activate it myself using LB, but when I just let it be activated contextually, that's when it's most useful. But with Precision Dribbling being both on LB and contextually based, you never really know when to use LB, when to let it do its own thing, or when to do something like Close Control LT. It's both inconsistent and quite confusing, and the worst thing about it all to me is that when it doesn't work, it's hard to tell why, so Precision Dribbling feels way too random at the moment.
Then another concern is that while Messi and Iniesta can do some amazing things when Precision Dribble works, there seems to be a pretty severe drop off - players like Gotze and Kagawa, two extremely skilled players, seem to use Precision Dribnling far less frequently and effectively. What worries me, is that if there's that big of a drop off from Iniesta and Messi to Gotze and Kagawa in their ability to utilize Precision Dribnling, what does that mean for my CM's with lower quality teams? Does that mean Precision Dribbling will be essentially a non factor outside an elite few players in the entire game?
When it works, Precision Dribbling is dope, but its implementation is questionable and right now it's more frustrating than it should be.