According to Gwen Owens' 1:30 sign off, since CN8's launch, their area of coverage has expanded "greatly" and i guess Comcast just wants the channel look less area-specific. Another example is their sports show Out Of Bounds moving to Boston (i think) later this year.
Not that it was the greatest newscast, but I'm gonna miss having news when there wasn't any on. RIP. I guess.