So, I believe most folks would agree that one of the amazing things about FF games compared to others is how beautiful and aesthetically oriented they are. Facial expressions have been taken to a new art form in this game, emotes, etc.
In a game where aesthetics are so important, I absolutely hate that I can no longer summon Carbuncle as a Summoner. I understand that Garuda is better, but I love my little 'buncle and I'd like to have him out and squirreling around.
I also know that I could just take off my soul of the summoner, but why should I have to do that? A Summoner is the epitome of the class that summons spirits into being to fight alongside him, and I disagree with the design choice that says that "ranking up" as a summoning class would suddenly keep me from summoning lower ranked summons.
I am on board with all other summoners when I say that I wish our Egi's were more detailed, but just giving me Carbuncle back would be a great start!