The only examples you've given are that he dribbled Madueke and played well against basically everyone we've played this season, which frankly isn't true. He has one goal and two assists in 9 PL games, not bad but certainly not enough to assert he's a top performer for us. And you're using the 'he's a wing back not a center forward' as a reason why he hasn't contributed more on paper, while totally ignoring that then defensive side of his game which, like it or not, is still quite important for a wb, has been poor.
He's been average this season - he's a fairly talented player but you are drastically overestimating his abilities as things stand