Twintania and strange aggro behavior

[KyroeFelix]

I am sure that powerup buffs now establish some low amount of enmity.

This. I have run T4 and I know that if I pop Battle Voice before the Tanks have hate on all the spiders, they will converge on me. Same thing happens to our blm when she self buffs. I wait 5 seconds before starting anything in boss fights now.