Point is, between not tanking and tanking tank DPS is getting a 10x-20x difference (as compared to DPS); what I suggested is to buff tank damage when not tanking much by 4x, and then to reduce the gain by tanking up to 2-3x, from 10-20x. Self-healing would have the same scaling as Live.
For one example, on Wind Lord, tanks are seeing huge numbers, but also remember that DPS also see big numbers (just relatively much smaller), hence tanks are about doubling DPS by doing 800k-1m DPS. Tank DPS on Wind Lord would go down to about 300-400k by my "solution" - which still isn't an "insignificant" amount of DPS nor "nerfing to the ground" but rather, reducing the spread. Bad DPS will still get beat, but not good ones.
- also, the fact that tanks scale so incredibly means that tanks basically are far more important for boss DPS/enrage than the DPS, since percentage changes in the main tank's output would make a much bigger difference than percentage changes in a single DPSer's output. So complaints aren't really that unwarranted in that direction.