I too am wondering about a 2018 charts because we are planning travel the week of April 15th 2018-- with a floating holiday such as Easter you can make a pretty good guess as to what season it will fall in from historical
points charts, but i guess
DVC can always change their mind. There could also be point reallocation too that may affect planning for your trip if point amounts have changed. So I can see that even that far in advance the 2018 points charts can be very important in the planning use of points.