Yes, very true that the game designers need to have some canon to go by. I would love to see the game "bible" to know what is in and what is out and how the open questions are resolved.
I suppose we'll just have to wait for the rest of the books to know.
I do think we can expect new material in supplements, sourcebooks and adventures while we wait for Age of Rebellion and Force and Destiny. Long Arm of the Hutt gave us a new creature already.