Endemerrin is correct about Ququruka. He didn't plot to destroy Eorzea. He sought to unlock the secrets of black magic. You can't blame society for drawing conclusions after he stupidly messed up his masterwork and created an abomination out of his colleagues. What Yayake and Lalai know is not first hand knowledge. I would put a greater weight on Ququruka's dying confessions.


You also have the wrong date on the first appearance of a primal that stopped the Garlean advance. 1557, not 1562. The battle of Silvertear Skies marks a notable exception to a 15-year period of inactivity from the Garleans.