He does need to up his game now, he's at risk of becoming the player that you bring on to see a win out. Like the Fernado Reges and Javi Garcia's of yesteryear.
He can't only be in the team to keep the ball safe, the same isn't asked of Doku is it? And it's not something outside of Bernie in Champions League late stages that Pep has asked of any of his wingers ever.
It's too early to draw any real conclusions from stats but currently his numbers per game(take ons, times fouled, shots) are wayyyyy down whilst his dispossessed/bad touches are the same. It's like the swagger is leaving his game, needs a run of games but also needs to offer more to earn that run.
Also with Kev out and Gundo gone this was an opportunity for Jack to lead the way creatively but he hasn't. So Doku, who tries to make something happen everytime he has the ball along with Phil and Julian have.