The final changes to the Book of the Void have been sent to the man with the source pdf, and will be released shortly. Now, as with any publications that are in any way related to gw, there will be spelling errors and grammar mistakes (I am looking at YOU forgeworld!!), PM them to me if you find them!
Here are some teasers.
All ship upgrades have their own fluff describing them.
Campaign rules have been updated
Background has changed significantly
Every ship now has three unique upgrades that may be taken in any combination, it just depends on how much you want to invest in a single ship.
A certain talented resin modeler is going to make ships compatible with the diasporex fleet... can you guess who?