Enmity has become less of a focal point in tanking because it tended to be intimidating for newer tanks, without actually having any impact on the skill ceiling.

Don't worry, though. There's another number out there that you can optimise. It's kind of like enmity, but instead of being an artificial, imaginary number, it actually has an impact on everyone's gameplay. It's called dps.

Hopefully we'll see a focus on more of the meaningful elements of tanking in the coming raid tiers, namely positioning, movement, and mitigation.