The thing is he hasn't learnt the basics, his movement, close control and hold up play is shockingly poor, look at the size of the lad and yet he cant win a ball in the air to safe his life. I know Benteke has been poor this season but even he can hold up the play and use his height/physique to his advantage. Lukaku also has pace yet he hardly ever plays on the shoulder of the defence, instead he constantly drops deep in search of the ball. We all saw at the WC how much he struggled against teams who drop deep, when he's not giving space he simply turns into a second rate poacher.