It would be kind of convenient if they did away with VIT accessories altogether and just balanced around all tanks using STR pieces.. But that would lead to crazy competition over STR accessories with MNK+DRG.

Just class locking all tanks into VIT accessories would be a crude fix, and take away the choice to switch to all STR gear for easy content.

Feels like something is missing from VIT.. maybe a second effect for tanks that increases healing taken? Or they could just -massively- buff the health bonus tanks get from VIT, then balance raids around tanks having VIT accessories or go splat.