Just wondering, was this based on the other theory that Mythal's essence were split into several pieces by the Evanuris?
As for the dragons, that is how she was represented. It's same way the wolf represents Fen'Harel and the owl to Andruil(?), among others.
I relate the Chantry teachig and Elven belief to draw my own conclusion that Mythal is one of the Old God, imprisoned because tricking men into worship them and they whisper to men to teach men magic. There is a colleration there with what we see regarding the Well of Sorrow...Mythal whisper to anyone who drink from the well
Kieran also mention about "dreams" when the "soul" or essence of the Old God taken away. We know that "dream" is The Fade, people go into The Fade when dreaming
We also learned that Flemeth have "horcrux", Hawke revive Flemeth at altar of Mythal. By what means Flemeth is able to do that i don't knoiw, i can only speculate it is the same like Voldermort making horcruxes.
Now relate with Dark Ritual of Morrigan, should a Archdemon is slain, the "soul" or "essence" can be trapped into new body yet to be born through sex ritual during the night before it being killed. Otherwise the Archdemon just travel to the nearest Darkspawn and live again. Corypheus did the same.
i suspect Andraste is also going through the same process, she got burned by the mages, but yet Andrastrian believe she being with Maker as the bride. That is only possible if her soul or essence is taken by the Maker in similar way Flemeth taking Archdemon essence from Kieran. In short, Andraste might be incarnation of an Old God. And maybe Mythal is Andraste in other form.
Kolgrim Cult believe Andraste is a dragon
Both the Chantry and the Elven story have similar point....a woman got betrayed and killed. Andraste got betrayed and killed by Mages, Mythal got betrayed and killed by Evanuris. Andraste have a husband named Maferath who is jealous. I am not sure the relationship between Mythal and Fen'Harel but it seems to be like they are lovers
For me, it is all about "soul" or "essence" of the Old God can jump into bodies and appear to be whatever they appear to be in history. Age old characters continuing their struggles and conflict in new body through incarnations. That is why the similar things happen in different cultures...but it is all lead to the Black City....