So during the recent event with Yoshi in Japan, apparently something was slipped in regarding the Ifrit weapons, or just Primal weapons in general. He said 'hold onto them', to what end, no one knows. Possibly, they may see an upgrade of some fashion in a future patch. Similar methods can be done with the Primal Ex weapons as well. How relevant it would be compared to other weapons already available, who knows, just food for thought.

Honestly, I got my original clear, got the little bit of lore that went with it and have been fine since. But the point I'm making is that just because content is not being as actively used now, doesn't mean it wont get additions later. Case in point - FATEs and Atma farming.