Solving the Fire Mage Problem

[PhalanxField]

Seems like it would change little to the current BLM playstyle.

That's the point. The "rotation" is the same, it's just which elemental cycle you're using.
Rongway is suggesting a purely cosmetic change, while the dev in that old thread was suggesting a similar change to affect gameplay based on elemental needs and/or gear (because casting Fire against Ifrit seems silly). The resulting rotational output of their changes is essentially identical - they just made the suggestions for different reasons.