I'd rather have summons go back to pre-10 use.
Like, a spell.
But let me skip animations.
And make them do real damage compared to other avenues.
So the first time I could go, "Wow, that's cool!"
And then skip it the rest of the time.
Then have one that's very long compared to the rest, like Eden, so I can go grab a drink or something.
I liked most of the FF10 designs, but the functionality of the summons was nowhere. They were always just a meat shield, sometimes. Most of them were disappointing in actual play, too, until they used signature attacks.
