Sure, but why though? I’m fine with Divine Veil being heal activated, there aren’t many situations where any party members won’t be able to get off a heal to activate it unless something has gone horribly wrong.
But I wouldn’t mind if it was turned into a oGCD shield like Devine Benison instead, make it easier to proc, so I can go either way.

What I would prefer for a change to Divine Veil is that if it effected the PLD, out of everyone in the party tanks are the most likely to need a shield due to them taking the brunt of the damage, so it seems silly to not have the PLD who casted it denied his own shield.