Tbf, I think he has been caught out by the pace and physicality of the league and it has got to him a little.
I have said elsewhere, I expect him to end up like a Pedro type player for us (which is not a slight against him as I always rated Pedro.)
However, the boy does need to be given credit in that he is still doing the basics right, even if his first touch isn'tthe best. Imo, next season he will be a lot better. Maybe not a 20+ goal player, bit certainly a 12+ one who gets a lot of assists for a CF he plays alongside (if we can get a clinical CF.)