so they're decreasing the importance of mastery? while making it stronger with the meta change? so by making it 'OP' as you phrase it, they make it less important.
I have never claimed that they already nerfed anything. By giving us more avoidance they simply decrease the importance of mastery. And by increasing the meta they make the already strongest mitigation by far with the best scaling even more stronger. They have not yet realized how ridic strong it will be. You will see what I am talking about. They will nerf warrior mastery pretty hard.