I don't know if they changed is his dialog again but talking to him in the Waking Sands, Urianger says something about the doom of the world being foretold in Divine Chronicles but it that is truly the unchangeable fate of the world then our struggle to fight against that fate is set too. I don't think Urianger is going to turn on us though I think he may play along with Elidibus for some time. Really, we need to find out what the Ascians know cause currently the Scions are locked in a struggle with them without knowing all the details of that struggle.

The Ascians seem to believe their way is the only true way to save the world and from the mocking way the WoD called us the 'Savior' of Eorzea, I suspect they have convinced him of it too. I have my doubts.