Playing for Germany NT, as you all mentioned, is just an option that she has. I think what she spoke up is to clear her name that had been treated disrespectfully, especially by Zé Roberto. For a player that had contributed so much at 08' Olympic and had spent so many years in Brazil NT, she deserves better than cutting by "non-technical" readiness. If she's not ready technically, then why the coaches thought that Natalia was? This is the question that Zé Roberto never answers directly.
As her fan, I can't deny that she didn't play well since 2010, but what I care most is that she seems less enthusiastic. I, personally, think less of passion is her biggest issue. If she can find the passion back, I bet she will find her glory again which will clear her name wordlessly. Since 04' Olympic, she has been through so much. However, there's no glory without suffering. If she can survive from all this, she'll be a greater player than she is now. Wish her best of luck as I always do.