Reminds me a little bit of that young lad Arsenal had - Yaya Sanogo - in the sense he can stretch team with his pace, run-in behind but offers next to nothing in terms of goals.
You'll know more than I do of course, but you've persevered with him as he's clearly talented and still young but ultimately, strikers are judged on goals and ability to produce the goods, he doesn't seem to offer enough.
Maybe he isn't getting the right support, but he's not holding the ball up enough.
He's very well thought of though, hopefully he finds some consistency.
Having 'potential' will only get you so far - needs to do more.
(just from what I've seen)