Losing the Landsmeet doesn't provide a real consequence of worth. You can still complete the game, you don't get any game overs, etc. That's all the side arguing against you meant.
I think we were discussing game options here. Of course the game is going to have you be able to continue even if you mess up. That isn't the point. The point is role-playing. Losing the Landsmeet is an important factor. It makes your win more significant to your story. It also allows you to role-play an underdog. I haven't played a City-Elf yet, but when I do, I will have him try to persuade the Landsmeet by bringing up the fact Loghain sold elves into slavery, which the Landsmeet doesn't really care about, and I will have him lose. It feeds into the narrative that the nobles don't care about elves, even when elves are in the right and humans are in the wrong.
The archdemon soul is utterly destroyed and the blight end,to make the archdemon win it is possible only into the Dlc.
Unless you view win or defeat based on the protagonist personal survival which does not change the outcome of the final result hence archdemon and his spirit dead .
I consider soul obliteration to be a bad thing, yes. By contrast, having Loghain's soul be obliterated instead is a win.
It does not change the substance which is the end of the blight always achieved,the archdemon can't win.
In what state the warden is after that doesn't change the substance unless you are too much self absorbed into the protagonist.
Those who opted for the US achievement i presume didn't wanted to gambling the fate of their friends or of the world with the dark ritual and/or did not want to use someone else for the deeds.
This isn't losing
It doesn't have to change the substance. It just has to give variation to the story. Origins has variation. Inquisition had little, and what little there was became nullified by Trespasser.
Well in this case it does change the substance, since the Warden can be either dead or alive. If that isn't a change of substance, then I don't know what is. I mean, sure, you could not care about your character at all and just kill him or her off, but many people care about their custom characters. The fact that some don't care doesn't mean the death or survival mean nothing. These are significant choices with meaningful consequences and outcomes.
It is losing. Compared to... ya know, not losing anyone? Or losing Loghain, who deserved it? That's great if you can die a meaningful death. But the world lost your character. Your companions lost their friend. Your surviving family lost their loved one. And in the end this is a variation in the storyline. It is an option that promotes player choice. Compare that to Inquisition, where you never really lose anything to Corypheus.
And I'll point out one thing here. Inquisition could have had drastic consequences, but it didn't. Take the possibility that Denerim is blown halfway to the Fade by the fire ship. It seems to only happen if you side with the Qunari and you make the wrong choices during the operation chain on the Chore Table. But do we see this happen? No. Does it affect the game in any way? No. How about losing clan Levellan? Any mention of it if it happens? Nope. Any reaction from your elven Inquisitor? No.
Your Hero dies, he or she gets a special funeral scene. Even characters you saved along the way show up, or different ones depending on origin.