Well, it's true that we miss pace and players who can beat (and note bite) their opponent.
But I don't know how he'll fit in our team. I mean will he be a regular starter ? Where will play Mata, Rooney, Valencia ? Does Adnan will get a part time role in this team ?
I saw a lot from him this season at Fiorentina, and he was good, but he was never as good as Reus for example, even in his potential.
I see him as a very good player (better than Valencia attacking wise, more regular than Nani, and FAR better than Young, but nowhere one of the best in the world.