There is no depth and strategy in many barspell/-na's/threnody.

FFXI's example,
For Tiamat, u use barfire only. There was never a time u'll reconsider to use barwater or any other bar's.
For Kirin, you will only be using barstone and wind threnody, never anything else.

This is what i mean by the illusion of freedom, you are pigeonholed to specific spells on specific contents, sure on some case like Salvage Bosses, u have to do Silena and Paralyna, but pressing one more button doesn't add more strategy or depth in it.

Regardin Elemental Wheel, Maybe we could see them splitting into two group, Astral Elements/Umbral Elements, both of which will covers 6 elements but only needing it to be only 2 variety of spells. While i actually prefers 1 spells compacted together, but this might make it for both sides to be happy.