In other hand. You're thinking i'm saying they have to change KingsGlaive when i'm saying "probably Noctis gives the ring to Ravus in Verse 2 when they meet in the Citadel and he puts it for a second time. Then he's aproved by the kings, sits in the throne, dies and defeat Ardyn. Letting Noctis live.
If they want to explain the "what if" this is the simplest way. Just a line saying "Nox Flourete and Lucis Caellum are different branches of the same family".
What we got in Ch.2 of episode Ignis, is just what could happen, if he decided to make another choice and that 'if' ending was just a fairy tail, nothing more, nothing less. The only value thing which we got and can accept as a canon, some pieces of Ardyn's background. That's it.
I really can't understand what you're trying to say. All what we need or better to say, what we would like to know, Ardyn's background, his previous life, his fallen, his mastermind games, confrontation with Shiva.
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Lord_Ham_Mork