What if we changed the way cures were scaled?

[Alberel]

If physick were INT based then you would have to change the SCH gear from a main stat of MND to a main stat of INT. Also, if a BLM cross-classes physick in their top-tier INT gear, with the way it specs out now, they would actually heal better than a SCH does now. This pretty much would cut SCH out from the game entirely.

Summation: It's problematic from both a balancing standpoint, a class efficacy standpoint as well as generally not fitting in with the over-all lore that the Final Fantasy series has established.

Not sure where all your balance arguments are coming from. How would a BLM with a single Cure spell outheal a SCH with fairy, shields and all their healing cooldowns? You do realise only the basic healing spell from each class is cross-class right?