I think they should keep the Egis around.
Better yet: they should implement more to be applied/changed through a dedicated UI window (instead of text commands).
On a related note, and after all these years, I'm real sick of people wanting to outright remove them under the pretense of "not being like past FF games" (like SCH or DRK currently are, amirite?).
All while ignoring the established lore set up by this game's universe.
Implement more Trances/Demi-Summons? Fair enough.
Removing Egis? Absolutely not.
Agreed 100%.
They should simply improve on what's already there, as well as implement more pets (even if they're just cosmetics).