Okay, first of all... calm the fuck down everyone
Second, this is Fantasy Flight games, NOT gamesworshop.
This is Rogue Trader, NOT Battlefleet gothic
So, the end result is.... Shut up and deal with the rules or house rule your ships
Um, Zel, GW has stated that anything FFG produces is just as canon as anything they, Forgeworld, or BL produce. Which is, amusingly enough, all equally canon according to GW. *begin hair pulling contradictions mode*
Further, and I may be wrong on this, I seem to remember someone named Andy Chambers writing chunks of this book. I hear he may have written some other 40k spaceship game too.
Though there are some new fluff inconsistencies between what we read in BFK and what we read in FAQ2010. The Voss trio are described as being, new, and super rare (BFC has none, BFK has a single Defiant because BFC didn't know what to do with it) as far away as the Calixys sector, which is significantly closer to Armageddon then Bakka. And this is going on half a century AFTER the first Tyrannic war.
There are a couple other alterations and odd choices (the grand cruisers all being different hulls with non-removable parts rather then a single entry).
On FFG: their production values are fairly high, but at times I feel writing quality suffers a bit.