What do these three codexes have in common with 6.5 or 7th edition? Allow me to wax on the topic. This post has been a long time coming.
JJ typing, as a buddy of mine Dylan said: The problem JJ and I have is that there are so many editions of 40k rolling around in our head we get them confused when we play. Thinking of that sentence makes me possibly understand why holidays are so hard on olde people. They are filled with joy and sorrow from a life time of memories, loved ones still with them and those who have gone.
While reading the Tyranid codex back in March something made no sense. Then it clicked when I remembered something from the 3rd ed Necron codex.
Minour rant about space marines.
Space marines are losing, or not winning, in tournaments and GW doesn't like that xenos are winning. There may be a nerfing of xenos "deathstars" so GW can ensure their go-to-boy is leading the charge again. You don't have to look to hard to notice that no other army in the 40k universe even comes close to 162 selections. Many armies are skunked, even double skunked by Space Marines. Hell some are close to being triple skunked by SM. My opinion, not based in fact, is that GW wants SM to win at tournaments (which they don't support.)
Off SM rant.
Xenos have been winning on the tournament scene and I couldn't be happier. I'd like for GW to include the FAQs in the books instead of them being online. However that would lead to some people purchasing a new corebook and codexes more than once a year. GW tried this in 3rd by releasing 2nd edition codexes which included the FAQs. Unfortunately online FAQs are the most cost efficient way to update information
My personal opinion for lack of FAQs is because that manpower is for writing digital codexes. Of course it would also take someone who can read to make correct FAQs i.e. Canoptek Wraiths are not affected by difficult or dangerous terrain yet when they charge into difficult terrain they assault at Initiative Step 1. I've heard that Rick Priestley does the FAQs. If he is, or whoever they are, doing the FAQs I personally think he should familiarize himself with the rules of the unit in question before ordering GWs million monkeys with typewriters to perform dictation.
Wrapping this up. GW has introduced rules into codexes that are later folded into the corebook. Like Monolith Heavy I believe that in the next edition of 40k you'll be able to make cover saves when in assault.