The stuff that's still at DAZ is the stuff they bought from him. ("DAZ originals" aren't always made by DAZ - these days, they buy a lot of their "original" content from PAs.)

I assume the missing stuff is still his own. It may be put into his store eventually (and therefore on CP). I suspect he has to repackage it, at the very least. He can't use DAZ's installer, with DAZ's readme, etc.