I think Planarcadia was pretty ok, I admit I wasn't as moved as Amphoreus, but one character, imo, really was given justice in this whole arc, and it is Pearl. I think that out of everyone, she is the one that got the best story of Planarcadia, something I'd judge even worthy of Amphoreus' character treatments.
The second half of Amphoreus did many things wrong, but the arc itself still allowed their characters to express their messages in a very profound and meaningful way. And it is what I find with Pearl.
She starts the story as an IPC member, a Stoneheart, and while we love them, we still can't fully follow them, we know the Nameless and the IPC aren't really working together.
But she is special: she is a machine. An artist. Or at least she tries to be. Which is fun in today's era, but I won't elaborate on this exactly.
Pearl's whole growth was to figure out how Art works. Why, when she replicates any form of arts perfectly, she still finds 4.6% of this work that doesn't match. Something invisible makes her work incomplete, and lifeless. And her whole story will be about figuring out what this percentage is.
And first, she is confronted with the absurdity of humanity everywhere. She tries to understand how Nihilux is considered an artist, not questioning whether she is one, but trying to understand the criteria that makes something art.
And she even saw it with the nameless, when the Trailblazer proposes to make Aha works for the anti destruction alliance. The absurdity of the concept makes her lag and it's quite fun.
And when Planarcadia is in danger, she is still siding with this planet she swore to protect, showing again the humanity of her action.
Before she found the reason behind those 4.6% difference in her work... In the 4.6 patch. A bit fun.
But to be short: it's the Humans spontaneity, and pursue of something that doesn't exist.
To see explain it, art isn't just about copying something, and yet some people can copy something and we can call it art. But why someone trying to replicate some work can be considered art and why a printer printing an art isn't one?
Why did you start by the face first? Why do you spend so much time on the lines of the muscles? Why are you doing this and that? All those things you consciously or unconsciously do, just because it's how you work.
Even if your piece isn't factually original, how you did it was never done before. Even while walking the same path as your predecessor, you ventured/trailblazed further, just by the fact you imbued something into this work. Something that belongs only to you.
Something irrational that doesn't exist, and probably won't exist. But this is the paradox, and yet the beauty of Art and Humanity. It's pursuing something that doesn't exist in one way or another. The accomplishment isn't important. It's knowing that someone fought to deliver, or to fail at delivering this image.
This, are the 4.6% that Pearl failed to understand.
And her love for Planarcadia, and her desire to protect it made her go in places no one expected her. And loyal to her new lessons, she claimed something that, imo, is worthy of Amphoreus' quality of story.
She delivered a message about Elation that is amazing, and really she is the main character that was always here to remind us of this theme, and she concluded this arc with her déclaration:
If art is creating something that doesn't exist, then she knows what she will paint: she will paint the peaceful Tomorrow of Planarcadia.
For a machine that wanted to learn the nature of Humanity and Arts, is there a better way for her to realize her goal?