Elfangor wasn't disgraced for sharing the morphing tech because Ax took responsibility for that action to spare the disgracing of his brother's name.
I found the excerpt:
Then Lirem said, <Young Aximili, your brother Elfangor is a hero. The people need heroes
in this endless war. I do not wish to tell the people that in the end, Elfangor broke the laws.
There can be no forgiveness for a prince that breaks the laws. Unlike an aristh. So ... I ask
you to think again. Was it truly Elfangor who gave this technology to the humans?>
I couldn't believe what Lirem wanted me to say. He wanted me to lie. He wanted me to clear
Elfangor.
<I...I was wrong when I said Elfangor did this,> I said, too shocked to argue. <It was ... it
was me. I gave the humans the morphing technology.>