You're calling it a fix that doesn't need fixing. It's not trying to fix anything. It's simply adding. And it'd be a silly argument to try and say they shouldn't ever add anything to the game.

Previews would be nice, sure. But, advance warning, on this particular subject, what would it accomplish? There's no way they would consider offering free fantasias or other compensation if players didn't like the applied changes, considering how minor the battle voice is. Being told ahead of time would not have changed the outcome for you at all.