While it's seemingly a cool idea, I'm personally against a diifferent UI on PC for K+M. Or gamepad (unless I'm derping and not reading this correctly)
I main white mage so I play with K+M since controller feels too sluggish for me. For battle jobs i primarily play with controller while keeping K+M an open option.
Unless it automatically changes with athe config option and I wouldn't have to restart/constantly/plug in or out my controller then I'm not ok with it