Disbelieve.
Daemonkin shows the same rules and the same point costs for all units in the codex as they are in the daemon and marines codex.
It would create a mess if they go and change the 2 base books.
Thats why the daemonkin are rubbing me the wrong way. I was expectim them more like harlequins with new options, rules and points instead of just the same with formations and a few minor changes.
They took the Harlequins out of the Eldar codex and changed them completely (with new models) while Daemonkin is "more of the same" without any major change.