Danyah said:
I don't like the order-chaos split between the KC. Doesn't feel good.
Yeah, but that's what we are directly told by Ganath in the text. Though her knowledge is old, and she wasn't given much time to form a new opinion of the Nah'ruk before they killed her, there's still no reason to doubt it is accurate.
As for the Imperial Warren, what seems to have happened is that it (Kaschan) lay dormant after the extinction of the KCCM, and K'rul somehow folded the surface of Jacuruku into this empty warren, Kaschan, he didn't create a whole new warren for that purpose.
Also consider a link - Kallor is widely speculated to have used KCCM devices/magic to lay waste to Jacuruku. This means that Kaschan was probably used in its destruction, and so it was natural for K'rul to use Kaschan in removing the problem, no?
Also, is Kaschan the correct term for the KCCM racial warren? It's the Edur term, and is just a distortion of "K'Chain", whereas other racial warrens do not share names with their races. Given the generally dodgy history of the Edur, and other examples of misremembered names (the Teblor and the Krussail), maybe Kaschan is better known by another name (apart from "the Imperial Warren")?