>>49630755
Especially considering you can pull a P2 on it and have you be able to choose between doing a Lobcorp event chain or a Ruina event chain and pursue the different endings depending on your alignment and choices. Maybe even a Limbus event chain if you wanted (though obviously no ending as of now)
And very easily give the player the ability to acquire EGO as equipment with its own unique form of demonization through corrosion if you wanted to get ambitious and fuse their own versions of Abnos through a shadow cathedral application.