I wonder if I may ask a somewhat silly question? If Nechung's time has ended, what is stopping Nechung from moving on to the enlightenment that he has earned after such a long service? Does Nechung have to be officially "released" by the Dalai Lama or what is the procedure to select a new State Oracle and protector for the Dalai Lama? From all accounts, it is clear that the time of Nechung's efficacy has long passed and his prophecies and advices have been proven wrong (whether done on purpose by Nechung or not, we don't know), so why this reluctance to let him go?
Nechung's role to spread news about Dorje Shugden has been tremendous and even the push for the ban (which is actually the push to make Dorje Shugden's name even more well known) by the Tibetan exiled government was in fact motivated by Nechung also. In 1996, when the Tibetan government passed a resolution demanding that “in essence government departments, organizations, associations, monasteries and their branches under the direction of the exile Tibetan government should abide by the ban against worship of Dhogyal”, they attracted unwanted attention from the media worldwide and were subsequently criticized severely for not handling the matter more delicately. After sitting for three days and not knowing how else to handle the controversy (very typical of the CTA), and not being able to decide the proper course of action for themselves...they turned to the Nechung oracle for instructions and of course Nechung manifested as an embittered opponent of Dorje Shugden. The rest is history.