Just played the demo and i love it. this post will be a mess because i'm writing as i play
I instantly loved the pace of the game, the passing, movement and control looks so much more realistic and the battling between players has been improved no end as well, its really good how players can get there body in between man and ball to take the ball (barging them off in some cases). Players like Matic and Toure are really fun to play with in midfield because of it. (get the fuck off the ball type of players

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Defenders taking no chances and hoofing it away is great as is keepers playing short balls and throws like most teams do in real life now to build up play and the keepers saves are so much more realistic!!! They dont always palm it out at 100 mph now they can smother the ball and pick up the loose ball. Just scored a nice looking goal with a fired ball along the floor the keeper dived out to intercept and did but only palmed it a few inches from his hands and Costa nipped in before he could do anything about it and put it in.
The ball and deflections are much better and even more random than Fifa 14 as well so there are some right scrambles and 50/50s. Plus defenders clearances can go anywhere so i just volleyed one in with Oscar after a poor header out.
We have ball boys now as well!!!! no more waiting for players fucking about.
The cpu is very fluid when dribbling and hard to tackle (Dzeko was taking me on a merry dance, I hate to think what Messi, Ronaldo, Hazard ect are like), but that's probably because i only play against makes and never use the contain button which i'm have to start using by the looks of it

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How do you dribble like they do btw?
The graphics looked like they have improved as well especially the pitch with the wear on it as the game goes on and players kit getting dirty.
The atmosphere/crowd/chanting is amazing though surround sound and you now get the oooooooooooo's when you have a near miss which has been missing on football games for ages and the noise when the ball goes in is very realistic as well.
Pausing it and leaving it shows the highlights which is another great little addition and the new team selection bit is so so much better.
Selecting what to do on a set piece is brilliant and the replays of goals are amazing as are the highlights showing more tackles, chances and skills.
Got to say as well the broadcast camera looks so fucking realistic but i'm not sure if i can play with that which is a big shame. Tele Broadcast aint a bad substitute though.
Final thoughts everything has improved, what a game!!!!!