I wouldn't be so sure about that. Yesterday's match didn't look spectacular, but if Costa Rica knows one thing, it's how to defend. The Dutch were essentially going up against 9 defensive players. And they still had some chances, even if it wasn't that many. With a bit more luck, they could very well have won it before penalties. Also, Argentina's style of play should suit them much better, when they can yield possession of the ball and wait for chances to strike quickly. I'm still betting on the Netherlands to go through.
Brasil just started becoming a bit more independent from Neymar, but it's still a very harsh blow for them. With him and Thiago Silva missing, Germany has a good chance. The German team is hard to judge. Against Algeria, the defense was reeling, but against France it looked quite well. The offense rarely manages to create great chances, but one way or another, they still managed to score goals so far. It's not as beautiful as it used to be though, with creative players like Özil and Götze playing way below their possibilities and Khedira and Schweinsteiger still not being quite fit.