So I read the official release for the update coming on August 3rd. And while I doubt this is what they meant, a specific comment stuck out to me and put a worm in my brain....
"Quiver----Add ammunitions that can be bundled"
Anyone with a RMEA ranged weapon knows the hell of running out of ammo during a boss fight, and getting locked out of shooting for 5 seconds after using the weapon for another stack. Of course, nothing prevents us from using our Gastra or Foma or w/e multiple times on a day we don't play RNG and stock up, but space is so precious these days. Wouldn't it be great if we could take stacks of Chrono Bullets, Quelling Bolts, Living Bullets, any of 'em, and have them bundled into /ex bundles for us?