He is in decline and with his speed deteriorating his overall impact has decreased notably as ir seems he cant get used to it, furthermore his short passes have been so sloopy lately, missing passes whenever theres a little degree of difficulty as if he couldnt care much. Without speed and hardly remarkable distribution skills the Diaz we knew is slowly dissapearing.
I would make this adjustments to the set:
Da 86 (flashy from time to time, but not often enough that sort of control)
Spa 83(could go to 82 but he may need a bigger sample size, he used to be pint point)
Sp 74(his shots are so weak is shameful, tries to blast them, loses accuracy and doesnt gain much power)
Other than that I think his defence contribution has been decreased and I dont see any reason for that. Hes never been the type of lazy amf to not come down and support defence a little, indeed he usually goes as deep as a Cm to help.
Also his ST I think was 85 before? Very well known he is very acrobatic, hasnt lost that. But well with so many cards who cares lol...
Descansa en paz Chucho