This will work making those a bit more attractive indeed, the main problem however is still the plates, moreso, the supply and demand forcing the price to a point where in my opinion it's not worth the pricetag.
As I've said before, as it stands right now gilwise an i119 Empyrian weapon costs considerably more than even a Mythic weapon (going by Bahamut prices for plates and Dross/Cinder), which is ridiculous because most Empyrian weapons are only equal to Relic weapons in the department of damage output (And only IF you ride AM3 constantly) but don't even come close to the extra utilities the Mythic weapons and some of the Relic weapons have to offer.