The tapestries
@full-moon-phoenix @thelovablycynicalerinmac @mysticcollectionbee I've always wondered the same thing as you regarding the tapestries. And the only explanation I can find is that their portrayals in the tapestries are not only a result of their actions in life, but also the role they were supposed to have in Mewni History.
Thanks to Into the Wand and The Magic Book of Spells, as well as Glossarick's nature, I've come to the conclusion that anything related to Glossy's magic (the wand was created by him, and he chose to start living in the book when Skywinne was queen) had some kind of clairvoyance. I believe those objects knew their fate and the fates related to every single user.
Don't forget Rhina's poem foreshadowed either the destruction of the book, or magic altogether.
So I think the tapestries are supposed to reflect how past Butterflys' actions affected the events that transpired and Star's final decision of destroying all magic.
If you ask me, it makes sense that Jushtin and Estrella's tapestries, even Festivia's, are so boring in comparison to Moon's or Eclipsa's.
Their actions as rulers/magic users weren't relevant at all to the story.
Jushtin was a great mathematic, but he didn't have the talent to be a mage; his spells added nothing of value, unlike Star's, which vary in a great amount of uses—and that was before she even learned to dip down.
In other words, his actions had no impact on Mewni's future (besides, even if he had been a proficient spellcaster, he would've lost the throne to Solaria).
Estrella wasn't even mentioned during the entire show. Glossarick even admitted in the magic book of spells that she never used her wand for anything that wasn't drawing, and that she was popular amongst Mewmans because nothing changed.
I'd like to move on to the most "controversial" tapestries: Festivia's, Crescenta's, and Comet's.
Festivia turned out to be an important character for the show (I remember being surprised she had any relevance whatsoever); she was the first ancestor of the Faux Butterfly family and, in the long-run, the reason Meteora went on a rampage and tried to get the kingdom back; she lost everything to an orphan with no connection to the Butterfly family. Heck, she wasn't even a citizen of Mewni!
However, as Queen, despite her popularity, she wasn't much better than Rhina or Estrella... Her entire rule was based on partying to keep her people distracted from the war. Because that's what she was: a diversion.
She was the High Comission's façade for the crimes they'd committed against Mewmanity and Eclipsa's family. They thought what happened to Eclipsa and Meteora would never go back to hunt them as long as people believed Festivia was a true Butterfly.
She never really made her own choices, she'd been heavily influenced by the MHC her entire life, she didn't even have offensive or defensive spells! She just spent her time partying, locked away in the castle, while Mina fought off the monsters.
When it comes to Crescenta, I think her tapestry isn't anything grand either because her most important act, which involved Ludo's family, was resolved fairly early in the story.
The Avarius lost their power long before Toffee even faced Moon, and Ludo found closure not through Star's actions, but his brother's.
And finally, we have Comet.
The fact that she's only ever portrayed if Moon is in the picture has been frustrating for many, myself included. But I think I finally have the answer for why her character is so dependent of Moon's.
Despite her best efforts at uniting Mewmans and Monsters, Comet's importance within the plot is not her own story, but her daughter's.
It was her death what encouraged Moon to take the decision that would lead to her very own tapestry.
It was her death at the hands of a monster what made Moon so distrustful of their kind and of Eclipsa that she only went on worsening her people's relationship with them, instead of finishing what her mother started.
It was her death and Moon's early coronation what eventually made Moon incapable of letting go of her role as queen, and thus, betray Eclipsa and Star.
Comet is important in the story, because she's Moon's backstory.
This got really long, and it probably doesn't explain everything (or I might even be mistaken), but at least it does provide some more satisfactory explanation (I hope).
