If it's what I think it is wouldn't it amount to the same thing except every time we cast a line of spells we'd have to switch to a different elemental spell line?
I mean we go from Fire to Blizzard Regen and usually apply a Thunder dot already before going back into Fire?
Seems like it would change little to the current BLM playstyle.
Not to mention the fact AF/UI stances are already hardwired into the BLM class.