As far as I understood it, the ratings affects which teams that will approach you post-match (a 7.5 in the French league means PSG always approaches me, whilst another rating has them not).
The stats are based on how much you do certain things. Trying do alot of dribbling.
-Never run. It counts as dashing and affects your Acceleration and Speed.
-Shot Feint. Shoot Button+Pass Button+Direction of where you wanna go. It's probably the best dribbling skill we have.
-Be egoistic. Try and dribble a lot even though the Scout match player is sluggish as a train.