I'm more interested on how they are gonna tackle damage calculations as a whole. Are they just swapping vit for str in the equation?

I kinda doubt it. I bet we see a slight nerf in damage for all the tank roles to reestablish the need for DPS roles. This is kinda scary, its the first step into the burn party mentality where people try to cut tanking to the bare minimum.

Before the flames, I don't think this is gonna happen in 3.2, but it is the first step to enabling it.