I played the demo and thought it was much better than FIFA 14. The gameplay seems to be quicker and slicker. The touch of players seems better and when you now play a through ball its not as overhit and goes where you actually want to get it. I liked the movement of the keepers and the more realistic saves they perform. Goal Line Technology has also been included which I thought was a nice little touch, more of a gimic though. Corners seem a lot better and there is an option to use quick tactics from them. Graphically it is immense, a lot of work has been done with capturing players and they look very realistic. The grass looks amazing on the pitch and deteriorates throughout the match. Players do not stay clean throughout the matches and if they have had to slide tackle through the game you will see the marks from this.
All in all it seems a lot more enjoyable than the slowness of FIFA 14 for the first FIFA made especially for the 4 generation consoles.
I am playing on the PS4 and if anyone wants a game they can add me "mogguliser".