Hard to say what they mean by this, might be that they will lower tanks dps and increase threat generated from attacks, might be that they lock those str acc away somehow, perhaps lock acc to classes or roles, perhaps they will make everything hit so hard that you have to use vit acc and spec, staying in tankstance when you tank unless you massivly outgear the encounter.

But for now all we have are guesses and we can only hope that they don´t mess this up, making it close to impossible to hold threat from 3.2 until some hotfix.