Your theory is fallacy and full of simplicity, in your scenario of it being attracted miraculously by Morrigan rather than the darkspawn only by virtue of her of being a beacon which have priority over the darkspawn who are more tainted than her child (because beacon reasons...) it would have simply exploded in her womb and recreated the archdemon from scratch since her child was tainted, understood why your theory doesn't work?
It isn't my theory. It is what is stated in the game. I think you misunderstand the process itself. Morrigan clearly says that the unborn child will act as a beacon for the old god soul, so that it will seek the child. She also states that at this early stage the child will not be affected and will not turn into anything else. Whatever makes this the case is unimportant. What matters is that this is what Morrigan states and that is how the game shows it. These are facts.
That light which is the AD soul in the scene try to escape into the air but it is drawn to the GW instead by the force of the taint and that's why the GW is suffering in tension,if it was a non-GW the light would have not even surrounded the body of the AD-killer and be attracted to it it would have simply escaped unaltered(because no taint)it would have escaped into the air and reach a darkspawn (or like you said miraculously Morrigan because beacon reasons) and poof again archdemon in both cases.
Prove that the same thing would not have happened for a non-Warden. We can't see what this looks like if a non-Warden does it, so you can't claim that the light is the soul entering the Warden, or that the tension is the result of the souls battling against each other. This is all speculation on your part.
The spirit of the critter is altered the moment it surround the GW who killed it thus it gain a resistance that combined with the resistance inherited by the child purify the soul and complete the DR.
More speculation without evidence. It is just as likely that the old god soul goes straight to the child and is not corrupted because the child does not carry the taint.
The whole Archdemon confuses me even more. He is supposed to be a tainted/corrupted OldGod. You kill him and his soul jumps to another tainted body. But why a TAINTED body? Does the taint corrupt the very soul? If only the body is corrupted by the taint, then the soul of the Old god should be free to go anywhere...right? So is the soul itself tainted (?? very big implications here, for all grey Wardens too ??) but they don't reborn like the archdemon.
The inner workings of the taint, soul jump, and Dark Ritual are debatable. I can offer my own thoughts on the matter, but what's important is that it all works as the game depicts.
I think the old god soul is influenced by the taint, which makes it insane and destructive. When it is slain by a non-Warden, the soul is locked in a cycle of traveling to another source of taint that is not resisting it, meaning a darkspawn or tainted creature. It is then in control of that tainted body, and its first instinct is to transform it into that of the dragon, which it always does eventually. It won't go to a Grey Warden naturally because the Wardens have resistance to it. The only way it will is if a Grey Warden strikes the final blow against it. This draws the old god soul to the Warden, and it results in soul cancellation.
With the Dark Ritual, this process is likely foiled by having the unborn child mimic the taint. The child likely possesses the magic of the taint, given by the Grey Warden's seed, but also has the mage mother's magic amplifying it. This is why the unborn child looks like a beacon to the old god soul. So the old god soul, being locked in this cycle of going toward another source of the taint, goes toward what it perceives as the strongest source of the taint, which is the child. Upon entering it however, it is unable to transform the unborn child because the child's body is not corrupted with the taint. The child merely held the taint's magical call. And so the old god soul is locked in that body and is now free from the taint.
This is how I think it works, and this is probably similar to what was going on with the Well of Sorrows. And that would explain how Flemeth knows how to trick the taint's magic. See, the old god soul, once affected by the taint and its magic, is likely sentenced to travel through the taint upon death. So producing a false taint effectively tricks this sentence or calling into sending the old god soul into the unborn child. It is as Morrigan describes it, a loophole. It breaks the cycle by bending the rules.
Curing the Taint would render a now former Grey Warden inept in their duties. I suppose that the cure could be used when a Warden begins to hear the Calling and then go into retirement instead of going off to die. That would be an interesting development however it has never been the stated of alluded to goal.
Right, it could be used near the end of a Warden's shortened lifespan. But it could also be used early on, like on Wardens who serve one year fighting in the Deep Roads, and then they come back and get cured and train more new recruits to go in. This would be to avoid the other negative side-effects of the taint. The cure could also be used on people who contract the taint. In order to save their lives, obviously.
It would be an interesting development, especially in how the First Warden and Senior Wardens react to it, and how the rebels react to it. Although in theory, any rebels who wish to leave the Order would just be able to take the cure and go home. There would have to be something else making them stay, like wanting to correct perceived injustices within the Grey Warden ranks.
It think it was alluded to, though perhaps not directly stated.
The Revelations in Awakenings were about the power hidden away in Grey Warden Blood and it's implications and potential advantages if harnessed. The narrative on the Cure the Calling story-line has always been about controlling the Taint and thus delaying the Calling indefinitely not curing the Taint itself.
Well the story with Awakening was regarding how it benefited the Darkspawn, so that's not relevant to this discussion. As for the idea of putting off the Calling, I wouldn't be opposed to that potential storyline. It's just that it doesn't make sense. The taint is what kills a Grey Warden. The Calling is just the song getting harder to ignore, and that lets you know you're about to succumb to the taint. Sophia Dryden for example became a ghoul. Had the demon not taken over her body, I'm sure she would have been nothing more than a ghoul, or simply a decayed corpse. So I think when the Warden-Commander refers to the Calling in his letter, he's actually referring to the taint. But obviously he can't just say that he's tainted, because that would be revealing too much about the Wardens.
"The taint allows us to sense the darkspawn. The longer we survive with the taint in our blood, the more potent it becomes. Unfortunately, this corruption will eventually overwhelm the Warden; over time, it devours both mind and body, leaving nothing. But what if the spread of the corruption could be stopped, or contained in some way? What if the Warden could become more powerful, without having that power kill him?" - Avernus
There was also a clear dialog going on between The Warden, Avernus and The First Warden. None of which involves a Cure for the Taint.
Yeah, but that is regarding Avernus' research. And look closely at what he's talking about. The
corruption of the
taint. The taint allows them to sense the darkspawn. The taint becomes more potent. It devours both mind and body. What if the spread of that corruption could be stopped or contained? He's referring to the taint the whole time, not the Calling. Again, the Calling is just a sign that the Grey Warden's resistance to the taint is failing. The Calling does not cause the Warden to die.
So either the Hero was referring to the taint, and used "Calling" as a code word to protect the secret, or else BioWare just epicly failed once again in their presentation of lore. Like they mixed up what was what. Taint? Calling? Eh, same thing isn't it? Yeah sure, just put in whatever. It's only that damn Hero of Ferelden people keep bothering us about.
"As the Architect surmised, considerable untapped power exists within Grey Warden blood. When properly prepared, its effects can be remarkable.
But my research has also revealed some alarming implications, which I've attached in the old Acanthan cipher. I urge you to send this to the First Warden at once." - Grey Warden letters - Avernus to The Warden Commander
Yes, Grey Warden blood. And the blood carries the taint, not the Calling, which is a song emanated from the old gods.