It got good again today!
One not entirely terrible chapter doesn't mean it's suddenly good again
Also, I believe Oda said that he just passed the midway point at around the end of the Whitebeard war arc. So there's probably around 400-500 chapters left.
I heard it was halfway over at Skypiea. Also heard he wanted to go to at least 100 volumes. I wouldn't be surprised if it goes another 10 years :/
--
http://img.imgcake.com/Radix1337/painting03jpguh.jpg