More than any book, the DMG will determine if my group fully embraces 5E (without the rule modules, the game thus far feels incomplete to me). So I am disappointed by this news, but I would rather have a better books a few weeks later.
For sure, I am just wondering why it isn't already at the appropriate level of quality...it's the last one to go. Is this a sign that some unforseen issue has popped up since late August and they need to re-write sections/add new ones?