Just noticed this and my only suggestion is a gallery function? I'd just like to be able to look at the full art of the monsters and also see what color palettes I've unlocked through each save file!
This could even give the opportunity to give little CGs for the moments the play has after tending to the monsters. Also I would love it if there was still interactions for when they evolve to be more human shaped and not just for when they evolve for the last time.