sometimes their det rises. for example sagna tuttored santon for 6months. he gained all ppm's after i sold sagna because he was 30 years old then after special training(hight tactics loaded) his det rise 2 points to 18. and i recognised something diff too, if you load high tactical training flair(maybe its affected by shooting and att i dont know yet) rises too. i mean its all about your training and players hidden attributes, i mean professionalism, ambition etc etc