Egi Glamour! Ideas for developers

[Exodus-E]

I suppose it's possible they could let us use the skin of a primal like Shiva with Ifrit's abilities, it doesn't make huge amounts of sense but it would be very nice being able to use our favourite.

Actually it DOES make sense.
The Summon I / II / III skills basically state that you're summoning a Caster / Tank / Attacker pet respectively, and not
Emerald Carbuncle - Garuda-Egi / Topaz Carbuncle - Titan-Egi / Ifrit-Egi.
So as long as these keep the same roles, you could change their appearance into whatever you want (like say, Ramuh for Caster or Shiva for Attacker).