It doesn't matter if they get locked or not. The real issue about wearing VIT accessories can already be seen - tanks end up with way more HP than they really need.

I feel like tanks will soon become just a mindless class that just has to sit there and take damage and not worry or think about anything, because dying will be impossible, and dealing damage becomes almost negligible. At least that's how it feels like for Warrior. At first I thought "hey, with VIT accessories maybe now I can tank in Deliverance". Turns out your damage drops so much, you don't even build up enough agro to do that properly.