What we are discussing here doesn't change the position or authority of GBC. This gives them the authority that they are supposed to have, that is given by the sampradāya, as well as it gives to the presidents their authority.
The movement of Lord Caitanya is to deliver the fallen souls. Those who accept that and try to do that - that's the movement. Those who associate amongst themselves in that mood - that's the society. And those who associate with the idea of organizing things so that these things