People will laugh at this but Dembele was a winger before Poch moved him back and he then became one of the best pivot players in the world. And while Kulu is no Mousa he does share some attributes with him.
He's strong as an ox, difficult to get the ball off, can receive back to goal, hold it up, spot a progressive pass. Can defend too. And he's smart, in footballing terms, so I can see him learning the role pretty quickly. I can see him being a good ball carrier from deep, a Kovacic type. Worth a shot at least. Nobody saw him as a false #9, then Ange moved him up top and all of a sudden he's scoring twice in a game and making all these brilliant runs.