Meh that just makes Tornado literally Aero 6.

Aero-> Aero III
Aero II (AoE) -> Aero IV (AoE)

If Aero III gets upgraded to Tornado, it's functionally just Aero V, and if Aero IV gets upgraded to Tornado, it's functionally just Aero VI, but perhaps they will change it to those naming conventions (Tornado for ST, Tornado II for AoE) because the suffixes in Japanese are getting obnoxious and they will run out (In Japanese, spells aren't ranked with I, II, III, and IV, but have suffixes like Fire, Fira, Firaga, Firaja, Firaza--enemies keep this convention, but not players). So perhaps just like Ruin became Broil, Aero III will become Tornado and Aero IV will become Tornado II, sort of a "reset" button on the naming convention? Meanwhile BLM will get Thunder III->Burst and Thunder IV->Burst II, and WHM will get Quake for Stone V (Stone IV already looks like a quake spell tbh).

As for Float, I'd rather see it come as an AoE spell for healer cross-role that boost movement speed (with the bonus of lifting you a few inches off the ground like in the Deltascape fight).