In THIS game? Without having reached the endgame, it's hard for me to comment. But from my experience in other games, you'll never notice a tank is doing an excellent job if you're playing a DPS. Only if you're the other tank and if you're a healer. You will, however, notice they're doing a bad job due to poor positioning or using their tools the wrong way (like the 30% DR CD after a big hit and not before, or a GNB using Superbolide when they're with over half health against trash pulls).

And I never said that tanks' focus is on DPS. I said it is a contributing factor to the group and should be paid attention to. When I tank here, my focus is still on my cooldowns and the things going on around me. Seeing what I have up and what is close to coming off cooldown so I can dictate the pace of the pulls. The thing with you and Valmarus is you're trying to apply something that is no longer true (if it ever were) to FFXIV today. Saying you have no control over how good or bad you're doing as a tank because you no longer have to struggle with enmity. There is nothing to have control over anymore. If you want to, turn your tank stance off and have fun with the hate you'll receive from your party.