Blair is somewhat interesting from the point of view that she's like the MC, she comes from a world that doesn't have magic, at least, not in the way that the worlds the others come from have. However, she's the other side of the coin to the MC. While he was quite willing to accept things and learn more about them, Blair wants an explanation that suits her worldview. If its in front of her, she wants to know how it works down the finest minutiae and she's quick to dismiss an explanation she doesn't like (for example, Caitlyn performing the rituals or even her and the MC discussing Pacific Rim when she's watching it).
Kind in mind as well that Blair was only just introduced a few months ago and since then, its been Naomi, Yona and Rae getting the main updates. Last in the door, last to get updates.
But it does feel like each girl is meant to learn some kind of lesson, perhaps related to the events that saw them end up in the House. Maybe they need to let go of some obsession or it would mean the end of them in their own world or maybe they just need to learn something about themselves. In Blair's case, I'm hoping she learns to take things more on faith than just face value.
As for Lyriel, yeah, can't fault you on that, but we'll probably get something soon enough.