More than anything, "Bibliophile Princess" is a show about improving the world, and cherishing individuals - treating people as who they are, instead of shoving them into some collective. Although the protagonist's motivations aren't clearly defined at first - she doesn't understand herself in the slightest at that point, after all - this is the core thats leads on the entire narrative.
When you look at the story from this angle, it's quite a tough goal it set out to accomplish, don't you think? Can this show really manage to be on the same level as something like Maoyuu (another pro-individualism anime with the same core premise, and one of the pinnacles of the medium)?
Well, no, not really. It's not as politically intruiging nor well-written as other works with the same premise. However, it's still worth watching as one of the better anime out there, life-affirming as it is. It's an incredibly comfy story (shoutouts to the protagonist's floof hair; I gotta squeeze her) that, above all, treats people with kindness. But if that was all, I would just tell you to watch another, better show instead.
What you CAN'T find elsewhere in the protagonist's unique journey of self-acceptance and self-discovery. She's the one character this story revolves around. Everyone else's job is just to progress her story (nothing wrong with that, of course). It's a fluffy, bubbly character arc: Going from living day to day in a daze, reading books without a clear goal, never realizing her true abilities - to slowly realizing that she is cherished by those around her, and that her incredibly deep knowledge of history and politics has given her a place in this world - to finding her true purpose in life: Improving the world, and being with her beloved.
It's comforting to watch, and as you watch her express her love for art and humanity, you can't help but slowly be swept away by her enthusiasm. All the while, she's so autistic that she can't flirt with her beloved to save her life, and takes every statement at face value (girl, this is royalty, you have to be calculating, dammit!). It's pretty hilarious.
She outright states later on that it's the fault of the state that the people are suffering, and that it's the state's job to support individuals. It may seem idealized (which it is; I mean, that's every anime), but her desire to support pro-individualistic actions is all meant as a love letter to history. Because of her knowledge and intelligence, nurtured by her love for books (meaning history), the world improves. Thanks to her love of history, her political power, her love for art, and her support of science, she has covered the four pillars holding up humanity - and uses them to change the world.
It's cute! Don't you think?

I also view the little character-arcs with the bratty 10 year old and the court women, among others, as an extension of this love for individuals. They don't directly advance the themes or plot of the show, but they drive home the point of seeing people as who they are. After all, how can the protagonist love individuals if there aren't any individuals, eh?

Once I get around to reading the novels, my rating will likely change drastically - for better or worse. Because while this story IMPLIES certain goals and political decisions, it hasn't properly elaborated on them yet. For example, one of the primary goals of the princess is to reduce military investments and increase investments in healthcare - an incredibly simplistic way of looking at the matter, one that I hope the novels will continue to explore in more detail. I will be gravely disappointed, however, if the novels don't manage to build on these political struggles in a satisfactory manner.
Who knows. For now, this was a great time, and I would recommend it to anyone who wants to cheer up while watching a fluffy, pro-individualistic show.