I'd be okay with it if Tenacity actually worked or had a noticeable difference. As it stands, the help-text implies that it's an overall tanking stat (damage output, damage received, healing received) but the math on it shows that it's minuscule (something like 1000 Tenacity gives 1 defence/magicdef point?). I know the new patch increased enmity on certain moves, but I'm wondering how well that increase will scale if our damage and tenacity doesn't scale as well as DPS through gear tiers.

But yeah, if it worked the way it implies, that'd make tanking far more manageable. As it stands, I'm not sure how new tanks are supposed to get into the role.