With Tzeentch we have seen no such thing - so far ALL of the releases have been absolute gold; the colours and iconography is unified, the miniature really are superb and as a first (well it goes back to the very old days of Realm of Chaos) the miniatures and the rule books span both Age of $igmar and Warhammer 40K!
Next week sees more releases, including a great value boxed set of Karic Acolytes - 20 minis for $84 AUD! Two great minis from Silver Tower now also get their own release with the Ogroid and the Gaunt Summoner now available seperately.. Curseling, Eye of Tzeentch gets a repack as does the ancient Fatemaster. There's also Tzeentch dice, the Disciples of Tzeentch Battletome (wonder how much of Liber Chaotica gets reprinted in this), a novel City of Secrets and the net in the Primarch's novel series looks at Leman Russ.
Certainly a good week for Chaos releases - lets watch them spill onto the battlefields of the Gathering Storm as the 13th Black Crusade begins.