Originally Posted by
CKNovel
They also killed a Garlean general who wasn't allowed to shine. He was just fodder to communicate the despair in Garlemald.
Due to the game being MMO, it's difficult to kill important characters.
They appear in previous quest, we know that they're supposed to be from a past time but it seems SQEX absolutely wants to keep them, even if Estinien is present in DRG quests in old armor.
Also, let's not forget that the Scions are quite powerful, now. Thancred is very unlikely to die, he 1v1 the top 1 pvp player in Norvrandt.
Estinien is, based on MSQ, much more powerful than the WoL.
IMO, it would have made no sense that a Scion would die, it would've been forced in this kind of "humanity versus monsters" situation when we already understand the sense of despair.
"We have no use for this character anymore, die please". Killing for the sake of killing would've made things worse, like a horror movie where the most experienced guy die.