I'm actually curious how your companions will react to this if you choose to embrace it or even if you dont'.
Will Cullen, Leliana, or Cassandra bring it up?
Oh, btw, I'm sort of Mage Jesus?
I'm planning on my first playthrough to play a male warrior who is a devout Andrastian but doesn't necessarily believe everything the Chantry says or does. He won't say it was Andraste that saved him as he can't say for sure if it was her or a fade spirit but he will think that the Maker saved him in some fashion. If anyone tries to question him on it, he'll at least try to say something along those lines if it's possible for us to in game.
As for him being called the Herald of Andraste and taking advantage of that, he'll probably follow along with it for the advantages it brings to the Inquisition.