He's in a slump at the moment all strikers go through one and he's not as bad as he was today (considering he's never missed a penalty for us until today).
Saying that iv always said the only thing he has to his game is scoring goals, sounds silly but he offers absolutely bugger all to the team in terms of anything else (even when he was considered a 25 million pound player), his hold up play is terrible, couldn't pass wind and often goes through games doing absolutely naff all before popping up with a goal whilst been wildly inconsistent. I don't think playing under Pulis is doing him much good but you'd certainly have to say he's well behind the likes of Kane, Rashford, Sturridge, Defoe, Vardy in terms of been a premiership player. I think turning down £21 million for him will turn out to be an awfull mistake as he will turn out to be a pretty mediocre premiership player.