At this point, I'd rather the Scions just follow their own pursuits separate from the WoL because if they did kill one now we'd never see the end of it. I think it's bad enough that Haurchefant and Moenbryda are milked to death. Granted, I think part of why they are is because they've refused to kill anyone since HW. There's also the issue that there's been so many fake-outs even if they did kill one nobody would take it seriously. There'd just be a feeling of waiting for the other shoe to drop and the moment wouldn't have the intended impact.

They're going to have to introduce new characters with no expectations of plot armored immortality if they want to ever write stakes for the protagonist's side back into the game.