From what I have understood even through meditation the archictect didnt really budge his position throughout, Bus top never suggested they could carry on without him and they eventually did resign – maybe because they felt they could not manage the project without him - or maybe they could not convince the council that they could do it without him.
FWIW impossible to know but I dont think the archictect was bluffing either. The relationship looks like it was too one sided and he did not have to bluff. Apart from money he had much more experience of building. Anyway we are speculating and i doubt the archictect or Bus Stop people will come on here to clear it up for us. Its too scary!