We need to sell the fringe players and sign some quality depth players. Players like Moses, Marin, Mikel (or even Falcao) got to leave for better squad players.
He needs more games. You can see his decision-making is not that great yet. Times when he should just clear the ball - he didnt. Times where he can retain possession of the ball - he clears it. Aerial duets - he doesnt win all of them either for his height and physicality.
I rated him quite high after seeing his performance at Vitesse. WC was so-so for him. Right now, he needs to regain his performance/confidence imo. Is he rotting away at Everton?