I wouldn't be worried about this bad results, they're still one of the current best series producers, people love the binge watching option and they're releasing new series like what ? Every two months ?
I think the problem may be that people will have more and more binge watching alternatives in other platforms too. For example, right now in HBO and AMC I could watch The Brink, True Detective, Vice, Halt and Cath Fire and Humans, a few weeks ago I could add Silicon Valley and Games of Thrones, so I'm definitely consuming less Netflix right now, actually I'm considering joining only when House of Cards or Lillyhammer have a new season.