"Why would norzdomu take on such a passive tone" have you never met the guy? He's humble as fuck boi was shown his own death, the death of the universe, and all he loves, and knows it will be partially his fault, and exactly how it will go down. Whole point of the bronze flight is their humility, that they need to be as neutral and unbias as possible in order to keep the timeline secure.
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I fucking love people who scream retcon every time we learn new information.
Fun fact for you guys.
If we know something happened, but not why it happened.
Then later learn why it happened. That is not a fucking retcon, that is new information.