To be honest, neither of those buffs look 'playstyle-changing', at least not the way that say, the priest T5 bonus 'get 100 mana for topping the tank off with a Greater Heal' could be.
It may be that the intent for T6 to have enough stats that priests will be willing to forego the gimmick bonuses.
It may be that the intent for T6 to have enough stats that priests will be willing to forego the gimmick bonuses.