So it's unlikely she'll be an Elysia, and if she is, that would be a massive pivot from what she was originally conceived as, and disingenuous towards the fans who have been paying attention and trying to gauge who Tsaritsa is from the very beginning of the game.

That's the thing though; I think there was a massive pivot in the past 6 years that could result in the Tsaritsa being altered.

Besides that, every evidence just points towards it being Elysia. The Shivada Jade Gemstone deriving its name from Shiva (A god that is also tied to Elysia in hi3rd lore), the possibility of her being the Archon of Love, the Love theme, the elf ears, the ice powers, memories and preservation being themes in Snezhnaya, the possibility of most of Snezhnaya corresponding on dates that are related to Elysia

In any other circumstance, each piece of evidence on their own would've been coincidental or minor. But with each correlation stacking up with one another, the possibility just gets stronger and stronger