I'd say his biggest weakness is his in-match stamina. Pep mentioned when we signed him that the greatest challenge would be getting Doku physically ready for 2-3 matches per week. I think Doku (and much of the squad) have been absolutely gassed through much of this season and you can see that he fades quickly in the second half. Doku still doesnt look physically ready to handle 2-3 starts per week but with the rise of Savinho at left wing and the Marmoush signing, I think we'll soon be seeing the best of Doku as he'll only be needed to start one out of every two or three matches to see out the season.Consistency is his biggest weakness, ninety nine percent chance that he will be invisible next game .