So instead of hearing "I'm about to rebuff, get ready to taunt!" over Ventrilo, you want to hear "I'm about to heal, get ready to taunt!"?

Personally I'd rather them explore and implement actually unique mechanics into NM encounters rather than place the most weight into enmity.

Edit - Or at the very least they could at least revise the AoE system somehow... being to AoE damage/heal entire groups with no mana or numerical penalty is somewhat overpowered.