It actually used to be like this.
Tanks had an enmity combo and a proper tank stance, not what could be referred to as enmity stance since the start of Shadowbringers.
Dps had Diversion and healers had lucid dreaming to reduce aggro generation, ninja even had buttons that interacted with aggro and were invaluable because of it.
While I personally enjoyed it more like it was before Shadowbringers, I don't ever see us going back. I'm sure it could be implemented better, but I don't think it's remotely on their radar or interest.