(More 過惰幻 yapping)

Adding to the Haruhikage connection, I think Adayume is sort of a continuation of the thought from this verse:

暗がりの中　一方通行に ただ　ただ　言葉を書き殴って 期待するだけ　むなしいと分かっていても 救いを求め続けた

My interpretation of this is Tomori just writing her feelings "into the void" of the paper alone, without anyone to talk about it to. She's just writing and writing, "lazily" hoping that someday, somehow her 散ることしか知らない春 will finally change.

Yet her one-way (一方通行) writing DID change her life after Saki read and mistook them for lyrics. But now that both CRYCHIC and Saki are gone, Tomori "realized" that it really was an excessively "hopeful" and "lazy" dream after all, just as she originally thought.

Also this might be reading too much into the lyrics, but maybe another interpretation for the lines どうして　飛べそうなんて 思ってたんだろう (Why did [you] think [I] would jump) and 拙い　勘違い (My clumsiness caused that misunderstanding) is Tomori looking back and describing the fateful encounter with Saki, which now turned out to be "just a wishful illusion".

Lastly, I read one interpretation of the "Zhuang Zhou's Butterfly Dream" narrated in Anon and Tomori's class in Ep 11 as: Tomori (who was sleeping in the scene) being in a "happy dream" after MyGO was complete. So happy that she's unsure if this is the actual reality, or if it just an illusion she's still dreaming up, much like in the parable.

Unfortunately, I can't find the original post to properly credit (I think it was in the comment sections of a YouTube video, either the Muse Asia episode 11 upload, or one of few dozen the JP/CN reactions of MyGO I watched 😭)