I do believe the original point of the cross was to improve laying yield; the ones with lighter lobes lay more eggs than the pure. They are being crossed back to Cemani to get rid of the lighter lobes, but in the meantime, this is the result.
Is increased laying yield even a reasonable goal for an exotic, such as the Ayam Cemani? I can see breeding for increased laying yields in dual purpose and laying stock - but I don't understand why it would even be a goal for a breed which - correct me if I am wrong - is not considered as a layer in its home country?