Why pushing the date back is a good thing

Typically when a content release like this is delayed, Valve wouldn't comment at all. The fact that their launch was delayed (which happens all the time in development anyways) and they bothered to IMMEDIATELY let us know what is going on is great. This practically confirms the fact that this content drop is Survival mode or an Operation. If it weren't an important update, they wouldn't bother letting us know why it were dropping late.