Well, I think the purpose of the "standard issue" Dreams is pretty much as stated, because without them aligning the Mandate versus the Consult, the latter could easily play the waiting game until they were sufficiently forgotten. Also, presumably the same mechanism is what protects the Gnosis, which places the Mandate above the other schools, securing them from being eliminated in some inter-scholastic war. I always had a feeling, as Akka's dreams changed, that Dream Seswatha and actual Seswatha are only somewhat related. That is, Seswatha of the Dreams was the idealistic Seswatha that the Mandate need to believe in to do what they must.