Matt: did they say that anywhere official? Iirc the last official word we got on it, during the previous army book was that the entire unit lost it's shots, even though reason dictates otherwise, and it makes all the difference in their value (once just one razordon is distrupted: hell yeah they are awesome, just as they always were until it changed to affect the entire unit).
Also, people complaining about the book, the more i think about it, the happier i get:
Are you aware that kroxigors are now THE BEST THEY HAVE BEEN IN THE HISTORY OF THE GAME?! Ok, they no longer instantly kill chariots, and the metagame has shifted more towards bigger units, but we have never gotten these stats for so low. Even during their glory days in 5th/6th they were 58 points each! More importantly, predatory fighters gives an extra attack on average from a standard 3-krox unit: We used to pay 20 points for that! (with added challenge-protection mind you)
Carnosaurs are now 110 points, used to be 210 points. They cut the bloody price in HALF, gave it multiple wounds against ANYTHING, not just large targets, kept the same stats, except now gave the option to give it bloodroar which means even Ld10 units are at risk, and Ld8-7 units are more likely to break than not (roughly).
And to be fair, the predatory fighters rule on Oldbloods does average almost 1 attack extra, so you have to also factor that into his point cost: that they do have effectively 6 attacks most of the time.
Cold one riders...well, cold ones got an extra attack, and we all know which of the mount and rider causes the most damage when dealing with cavalry....

Even the riders have a slightly bigger chance of being useful now; Remember, even if its just 1 extra attack, we used to pay for it.
Free spears? Sure, i'll take it, and cheaper temple guards is always good. Terradons are still not as insane as they used to be (ripperdons come close, but frenzy screws them over, still, does anyone remember just how nasty the old 3 A str 4 terradons used to be?)
A-stegs down 45 points, and made better? Fine with me. with the Str 5 Automatic hits with Multiple wounds from impacts, these guys will typically kill anything big they hit outright.
Overall, sure, there are things which are slightly disappointing (trogdorsaur amongst them), but compared to the old book, these are almost all upgrades.