Square win US patent for one-button RPG battle system because complex menus are intimidating to novices - invented by FFXV co-director

[Kazus]

Some of you aren't understanding. The battle system is a system where if you're close to an enemy, maybe the action will change automatically to attack but when you're close to an ally, it may change to cure or white magic.

You won't be choosing the action, only confirming it with one button.