A kickstarter update went out a couple days ago.. here's a relevant passage:
Our remaining tasks are to lay out the rulebook and the reference cards, plus some other minor art tasks related to the box and the special achievements. We also need to do the wording-consistency pass on the Artifacts cards, where I make sure everything's clear and easy to understand (I have a pile of feedback from beta testers on this to integrate!)
We're sorry it's taken longer than planned to get this project done, but we're confident it'll be worth the wait.
No clue what that means in terms of timeline.