Eventually enmity and CDs will be all that matters on a tank when every set of gear that comes out lowers the relative contribution a tank makes to the fight. If everyone goes up by 10 percent but one role went up by 1 percent, yes they did more damage than before but less of the total damage contribution they made before.

I have no issues doing good dps and tanking atm and will continue to do so this savage set but eventually a tank maximizing will be of very very little relevance.

What I don't get is why you are so vehemently against the idea that everyone should get better at the same rate. I'm not advocating to do the same damage as a dps. I am advocating that we stay a permanent x% behind dps, not continually falling behind further and further.