Quote Originally Posted by MariaArvana View Post
Yes, tank dps (proportionally) has fallen by about 10-15%. The tank mastery trait changes how STR/Attack power scales for tanks, making each point of STR worth less per point than other jobs. The only reason you didn't notice it at the beginning of the expansion is due to the fact they slapped roughly an extra 500 STR onto your accessories. (each accessory was around 51 STR pre-expansion (without str meld), each of the i400 accessories now has 171).

If tank mastery wasn't affecting damage output, all the tanks would be doing an extra 1-2k dps than they are now given their current STR value at 470. Its a super oversimplification of it, but think of tank mastery as giving you both the defense buff and damage penalty of old tank stance, only its constantly on, which doesn't surprise me much that they reduced the max HP of the first raid tier's bosses by 15%, since they were probably seeing how tank & healer dps would play out given the overhauls they did to both.
The deception in game for the tank mastery trait actually says it gives “a bonus to damage dealt based on your strength attribute” are you saying this is a mistranslation or a typo?