What if we can use enmity as a buff ?

There's already severals gauge that we use in the game mechanic.
HP, for surviving (duh) but dealing more damage in case of DRK
MP, for casting all kind of spells
TP for WS and DNC abilities
...
Our specialty has always been enmity gain, so why don't we use this enmity to power us up ? Creed Cuirass +2 already use this as a potent damage taken-, but we can think of a lot more possibilities.

Damage based on enmity, cure potency based on enmity, enfeebling resistance based on enmity, etc...
These can even be stances, like the couple Afflatus.

It was called Atonement. They deleted it from the game though.