"I don't think that arresting Wain on the floor after her speech would have prevented this. If anything I suspect it would have made it worse. Shutting down the Abyssal pamphleteering would have prevented this, or bringing in a thousand paladins last night instead of this morning, or doing the rain preemptively, but - think about it. If a priest of Iomedae says 'there are diabolists still in power', and the Queen's men drag her off - maybe some men are discouraged from rioting because they see the price they'll pay. But a thousand others are persuaded her words are true. The people of Pezzack rebelled when the authorities declared a popular play to have been retroactively illegal and sought to put its well-liked star to death, and your takeaway is that we should've tried that? - to be clear I think we can execute her now, as liable for the deaths, but I don't think we'd be in a better position if we'd done it yesterday.
Similarly if the Archmage hadn't banned dueling. How does that go, speaking purely of how it looks to onlookers? Someone challenges her, she declines on the grounds that her church doesn't permit that. You run her through anyway? Do you think that convinces people she's a liar? I don't know anything that would convince people she's a liar, which is why I have focused on laws that prevent the dissemination of lies. The thing we were owed last night was a show of force in the streets. I don't know why that failed to happen, and I do intend to press Her Majesty on it, when she's less busy.
As for what to do with the criminals now - whatever works, it sounds like we're all in accord, and just in doubt about what that is."