According to him, though development on the game is proceeding very smoothly, there was a need for additional polish of some of the game's features, hence the decision to delay the game was made. (gearnuke.com)
Coordinated research and development is underway with China, India and the United States to conduct additional polishing work. (tmt.org)
We don't know if this reaction had any part in this, but Konami has now announced that Survive has been delayed to early next year, with the intention of adding additional polish to the game. (gamnesia.com)