slimboyfat : Yes they’ve certainly departed from the “teachings handed down to us”.
Yes, to everything you wrote in this post. But I think it goes further. The belief that God is using the faithful and discreet slave to dispense food at the proper time, together with the light growing brighter, meant that providing there was some scriptural support for a new teaching it would be accepted almost without question. It is even feasible that there could have been "new light" about the relationship between Christ and God or other core beliefs, and it would have been accepted. But to change the understanding of the faithful and discreet slave itself means that tomorrow it may change again, so why accept something as true from an oracle which was never what we thought it was and may be something else tomorrow.