Meteion nods as Estinien names them a resource--though by her expression, his question about primals goes over her head.

"After, I suppose...is that a really big concept?" It wasn't as if she'd been created unintelligent, but her purpose was something a bit more narrow.
As for whether she was aware of what happened post-sundering--there was a chance that she or one of her sisters could have seen it, but...

Question there: if she and the Meteia had, why hadn't they brought more to bear against Etheirys itself, then? Since that world and its denizens were the ones who posed any threat.