"An Egi By Any Other Name" (and how they're gonna implement/justify actual Egis)

[Exodus-E]

(This topic is a bit of both, lore and general discussion-related, so I'm putting it here)

As we've seen thanks to this quest, it is possible to alter the appearance of an arcane entity by simply focusing on the "image" of something else while in the process of summoning it.

And while the appearance of said entity will indeed change, fundamentally it'll remain the same as the original, at least in terms of "composition" (ex: Ifrit-Egi -> any Carbuncle = still a fiery melee-based entity).

This, of course, opens up *a lot* of possibilities when it comes to color variations for Carbuncles, but still...one (BIG) question remains:

How are they gonna handle other Egis (such as Ramuh-Egi or Shiva-Egi)?

Here we're talking about completely altering their aspected structure (nature, skills, etc.), so this is not about using an "image" applied to an existing entity; it's about changing it entirely.

So if they ever implement other (actual) Egi models in the future, they'll have to justify their existence by an alternative method for changing what we already have (while reminding us that our "aetheric reserves" are already at their limit by creating 3 separate Egis).

Thoughts?