It looks like Microsoft has installed the "back door" that FBI Director Comey wanted.[1][2] That may be the real motivation behind these "features". The "backing up" of the local drive encryption key to Microsoft servers is one of the things the FBI specifically asks for. Any press reading this, ask Microsoft what communications they've had with the FBI regarding backdoors.
[1] http://www.theguardian.com/technology/2015/jul/08/fbi-chief-... [2] http://www.theguardian.com/us-news/2014/oct/16/fbi-director-...