Aha, my bad. You're right, I forgot about the Form Acquisition Knacks and assumed the extra bells and whistles came from Glories.
I was being at least somewhat facetious, but it's true that Glories introduced the ability to take the form of Ghosts, Gods, and Raksha, which in 2E were all more useful than the baseline animal forms.
None of that means that they have inherent connection with ghosts, raksha, or celestial level deities.
My bad! Though given that Miles Long Serpents are
explicitly mentioned by Vance as being on the table, there's still room for debate. He certainly said in Kaiya's link that the Grosbeak would not qualify, but creatures like the Metagalapan Hawk or the Tiger's Eye are still very much on the table.
Maybe not a whole circle, but I'd give it better than even odds with a starting Solar that isn't optimized for combat.
It carries implications about the characteristics and personality of the Lunar who has the totem. It's as central to a Lunar as an anima banner is to a Solar. A reader is going to make assumptions about say, a Lion Totem Lunar, a Bull Totem Lunar, or a Hyena Totem Lunar, by default.
I'd rather not let it be something that absurdly cartoony or wacky for the sake of it.
Sorry?

I mean that for the most part, the property that makes this creature unique compared to a mundane Serpent is Legendary Size and some heavily scaled up Soak, Strength, and Health Levels. Lunars can in fact devour and take the form of animals with Legendary Size, so I don't see any reason why they must be taken off the table especially when Vance said they were fair game.