Coinbase merely added Bitcoin Cash as fast as they could...stop acting like there's a conspiracy behind the time of the release.
Originally they said Jan 1st, 2018 so I'm glad they are ahead of schedule.
You don't think it's a teensy weensy bit timed? And the only thing they confirmed was the distribution of BCH which as far as I know still hasn't happened so may well still be that date. They said precisely nothing about adding to GDAX or Coinbase retail until it came out of nowhere a few hours ago and was instantly ready, though it' was obviously a possibility.
Coinbase originally said they were only going to allow the withdrawal of BCash on Jan 1st. Nothing more.