>>49376744Because playing it early means you play a worse game, and playing it again once it's better is equal parts cool and tedium.
Trust me, I've done this before, it's always better to just wait a year for the game to finish, and get the first exposure to the game in its completed form. At the end of the day it's up to you, of course, just, that's what experience with the current console gen has taught me. If you're actually interested in it, wait for them to finish it.