The response to Everlux being deemed as "not Light Flight related" that's diligently important because everyone seems to forget fanon =/= canon material, even in the "let's disregard most canon anyway" game, because honestly not a lot of fanon is even similar between most players. I'm posting this publicly because I doubt everyone with this issue will actually go to the Dev Tracker and read this.
"Angels as the Light aesthetic or concept is fanon or head canon, not official canon.
Fanon/headcanons are valid for your own personal gameplay, but not what we base our development decisions on. We are also not responsible for player fanon or head canon.
Officially, Light Flight is about knowledge, scholarship, philosophy—not angels or seraphim. The Light dragons of the Sunbeam Ruins are philosophers. They prefer to be unbiased and logical, revealing the nature of the world as do the rays of the sun. Of all the dragons, Light dragons are the most scholarly, holding the pursuit of truth as the highest virtue a dragon might aspire to. Scrolls and relics are their favored treasures.
I should note here that many of your examples require the support of the accompanying lore articles and stories. Granted, Dusthide and Everlux currently don't have stories—and we plan on addressing that in the future—but even with just the breed articles, we can see where Everlux fit in.
They are bookwyrms. They are dedicated archivists. They live and move with grace, mindfulness, and elegance."
And also the link to the encyclopedia page to read for yourself