I'd agree on Belgium but it was a bit of a nothing game and he's barely seen the ball all game. 6 isn't a bad return given the record is 16 World Cup goals, Klose has played 3 more world cups too. Even excluding the penalties, 3 is better than most English players have scored at a World Cup.
He had a couple of chances/half chances vs Belgium that he completely fluffed. Yeah still a nice return.
I don't think his all-round play has been anything special. Normally when you look at a Golden Boot winner (especially with six goals) you assume that he had a lot more than a "not bad" tournament, but that isn't the case with Kane. That's all I'm saying.