I doubt that the stance is going anywhere. My hope is that in stormblood they'll give BRD and MCH a second stance that's like the opposite of the current stance.

Like something that will double their attack speed but increase their tp costs, so they can stance dance like tanks, use the speed stance normally or when they need to move, but when not moving or low on tp, you can switch to minuet/gauss for the extra damage.