I honestly don't have the words to describe how much I love this faction and how blown away I was when I first saw it. The art and design are pure mastery, and the tome mechanic is probably the most beautiful, appealing engine I've seen yet. I'm genuinely excited to try it just to feel what it's like to flip the pages and unveil the story! On top of that, the narrative is incredibly poetic, super "Rooty", and so coherent. I really expect this to become a massive hit!
If I had to nitpick (but take it with a grain of salt), I think the current weakness lies in the mechanics around the hero quest. A faction with such a massive thematic and narrative core engine doesn't really seem to need so many extra pieces (6 buildings, 8 tokens, 20 warriors). This plethora of pieces risks (?) making the gameplay lose its tension and mechanical elegance. Also, the shrews' daylight actions might be a bit flat and linear. I could be completely wrong, but my gut feeling is that it offers a bit too much agency, which takes away from that tight puzzle feel.
But hey, this might just be an aesthetic worry that doesn't actually show up once you get it to the table!