I think most people can agree that Thedas as it stands is broken in a lot of ways. Things definitely aren't working as they are supposed to be. My guess is that this is why Flemeth [and to an extent, Morrigan], are anxiously awaiting some great 'change'. The veil needs to be down in order for the world to start healing itself. So at least part of Solas's plan isn't unreasonable.
It just might cause a lot of calamity in the process as various powers vie for control.
Yup, I think the same thing.
In fact, the title of Herald itself has been implied by Flemeth (and Kieran) to mean so much more than what most Thedosians think it means.
"A Herald indeed. Shouting to the heavens, harbinger of a New Age."
So... Viddasala may not indeed be wrong when she said that it was actually Inquisitor who began pushing the world into change. Even if the chain of events that led to Quizzy's rising began somewhere else - years ago, before Corypheus or Felassan... who knows, maybe even before the Veil was created.
It's a controversial statement, I know, but I'm starting to think that the world needed change even before the Veil and that it's been indeed long time coming. The world of elves wasn't perfect and Mythal and Fen'Harel seemed to be involved in making a difference - that much is rather strongly implied. The Evnauris made their move against them, Mythal died and it forced the Dread Wolf to act.. but perhaps from world's (or Fate's, or.. Maker's?) perspective the creation of the Veil itself might have been an important step in a route for a necessary re-balance, by letting new forms of life with different perspective grow and make their mark, because back at pre-Veil times such new ways of thinking, or perhaps the strength of spirit or resolve necessary for "the Final Push" was unobtainable.
I bet not all may be comfortable with the idea that everything that happened till now was a matter of Fate, but again - I just don't see it that way. For me it's equal parts fate, equal parts choice, which is exactly why we can play Quizzies who will get their chance to redeem Solas or those who will fail to impress him (and anyone else as well) and likely may squander their chance to make a real difference.