I still think that taking damage should lower the enemies emmity towards you, would make utilizing all your damage smoothing tools important in fights and could be a means to make a tank have to focus on keeping emmity without it coming down to party aggro management. aka "tank use your cooldowns please you are losing your aggro so fast!" heck they could make the tanks damage reduction cooldowns even include effects like "lose 50% less emmity for the duration of this skill" to go together with this can even make boss tankbusters naturally shave away more of that emmity when the tank gets hit by it. (angry guy punches thing making him angry and now he is focusing on other things) obviously provoke would either get a cooldown increase or it would just be an "aggro swap" with whoever the bosses current target is. honestly there is so much they could've done instead of just pretty much scrapping down the aggro system to bare bones like they did