Yes, the whole Inquisition was full of blasphemous crap, that's why initially we were being called heretics. It's why I found it hard to understand where all this chosen of the Maker, Andraste in the Fade, Herald of Andraste stuff was coming from when I first played it. I thought we had established in DAO that the Maker was an absentee god. He came back briefly because Andraste was a good singer, decided to help one last time, then abandoned Andraste and humanity when she was taken prisoner and burned, although Andraste was okay because she was taken off to some indeterminate place beyond the Fade to be at his side. Andraste is constantly pleading with him to do more but the Maker is adamant he will only return once everyone is singing the same song. That was the Chantry's whole justification for spreading the Chant, by force if necessary. Leliana was a heretic for even thinking that the Maker would send her a vision, small as it was. Even the Guardian said that. The Chantry sister also didn't want us giving false hope to those soldiers when they asked for amulets to keep them safe.
There were hints at something slightly different being introduced in DA2. It did seem as though you could offer up prayers to the Maker and just possibly he might answer. Then you had Sebastian keening after Elthinia had been blown sky high, asking the Maker how could he have allowed that to happen? Simple Seb, you've spent your last few years reciting the Chant and spreading the word; the Maker doesn't get involved.
So when we got to DAI and all the Herald stuff started I was a bit puzzled people weren't a bit more sceptical but it seemed that my advisors thought it best to let the masses have their illusion. It was apparently good for morale and apparently more likely to keep me from being lynched rather than less. When I read WoT2 I realised why the common people might think I was the Herald; they saw the Breach as the prelude to the end of the world, as outlined in Drakon's vision that inspired him to found the Chantry (another instance that seemed to fly in the face of what is taught). Still the Chantry in Val Royeaux were more consistent on the matter. Whenever I was asked, my Inquisitors either emphatically denied it or said they didn't know. Yet, no one paid them any attention and even seem to suggest I should be more open minded about it. I could understand Leliana questioning why the Maker didn't do more for Justinia because of her previous history, but Cassandra thinking I was the Herald and later on praying to the Maker for my safety was very odd. Does she not know it is pointless? Then when we discovered the truth about the Fade, everyone from Hawke to Mother Giselle was telling me to lie about it, or at least keep quiet about the truth. I noticed in the Chant that the Maker doesn't like liars, so apparently everyone was trying to get my PC damned by the Maker. No that they were particularly bothered since by this time they were beginning to seriously doubt the Maker anyway. After Trespasser I wouldn't be able to keep up the pretence but I was never allowed to say as much.
This is why I found it so refreshing to have Solas say what he did. At least someone sees in the game world can see the contradictions and manipulation of the masses that is taking place. To my mind, as you suggest above, Solas is the Maker. Everything that Andraste allegedly attributed to him seems to have been done by Solas. He created the Veil that separated Thedas from the Fade, cutting off the spirits so they could no longer interact with people directly and some of them might feel rather angry that they could not, the others not that worried. He imprisoned seven old gods, just as the Maker did. Then disillusioned by the world he had created, he left it to its own devices while he took a nap. When some interfering Magister tried to break into the prison (the elves believe the Creators are locked inside the city) they found it empty but got a nasty surprise. But apparently Grey Warden scholars dispute a lot of the detail about this last bit and Solas knows something about it all but I'm pretty sure he knows where exactly they ended up and what actually caused the Blight. So Andraste and Hessarian probably got that all wrong. The Chantry claim Hessarian made his Canticle up; well they would know.
So at the end of a rather long post, in terms of Chantry dogma, Solas is the Maker. And now he's returned to bring about the end of the World.