I did see a lot of temp. use items and medicines, and possibly! If that's the case than I'd love if they boosted the effects of potions and Ethers that we currently have! As an alchemist they are easily produced, but not very helpful especially in the case of boss battles as they don't replenish a lot of MP. And with the current boost in MP cost, I don't even know if one ether would cover the cost of one heal.
For melee though they'd be great, and that's a great catch!

From what I saw, they didn't cost a lot of seals, so it'd probably be a worthwhile investment to start stocking up on such items, particularly if you can carry more than one at a time. I'd love to see strategies involving both skills and items to make a re-appearance. At times they were obnoxious in XI, but it was always fun to find out that a combination of certain farm-able items weakened a boss.