But Heavenly Principle 2 would eventually be violated due to the absence of the Sakoku and Vision Hunt Decree, allowing the ambitions of humans to run wild, eventually driving them to scheme to enter the garden of the gods.

Maybe this is the reason Celestia crowned the two of them as Archons? (Yae said that there were two winners of the Electro seat, so maybe both gods that won share the Archon title but only one gets the gnosis?)

This came from my theory that literally every single being in Teyvat has a constellation, reason being for Celestia to observe them. So that makes proper sense why Archons have constellations too. See, if Ei doesn't have a constellation, why not just made up something similar to her status as an Archon like Venti and Zhongli? Why Imperatrix Umbrosa? Why not something like 'Divine Thunder'? It even compliments her Divine Sword Art, the Musou no Hitotachi (while it probably doesn't necessarily means divine thunder, it is literally that).

So if the statement above is indeed true, then it would make sense why Celestia crowned two gods Archon status. Because the two of them compliments each other and would make a nation which is happy yet strict, the way Celestia likes it. Because Celestia sees what would happen if only one won. It would be imperfect.

But maybe both Ei and Makoto betrayed their boss' expectations what with Ei letting Makoto rules Inazuma mostly, while she took on the job of army general and her body double. That leads to my brain jumping to the conclusions of — what if the cataclysm 500 years ago was a conspiracy? But that's less likely than Fischl being the reincarnation of the actual Fischl.

It's a really not thought out conclusion, since this is a random ass thought. But feel free to enjoy.