The snatchers don’t have to change their mind, I’ve made a pretty strong case to ensure they’ll win if Roy turned out to be the actual oracle 
Up to this moment in the game I was still more convinced @syoon was the oracle than that Leira was, since I couldn’t rhyme Haze coming out as a lover as good strategy, and killing Haze was just too convenient, given that it would’ve killed the witch if she didn’t use her potion. But an oracle investigating their imitator was too ridiculous to believe…
My prediction: the protector should come out and claim they’re alive, then everybody will rejoice, since that secures the ‘victory’. Sanonius will die first of the snatchers, people get suspicious when James doesn’t get killed the night after papavero dies, then it’s probably too late to do anything.