I don't think that's the cause of the confusion. Take a look at all of the combo enders for the Tanks.
WAR
Storm's Path: Deals Damage... and reduces enemy damage dealt.
Storm's Eye: Deals damage... and reduces enemy slashing resistance.
Butcher's Block: Deals damage... and generates a ton of Enmity.
DRK
Delirium: Deals Damage... and reduces enemy intelligence.
Souleater: Deals Damage... and provides a self heal(in Grit at least).
Power Slash: Deals Damage... and generates a ton of Enmity.
PLD
Goring Blade: Deals Damage... and provides a powerful dot.
Rage of Halone: Deals Damage... and generates a ton of Enmity.
Royal Authority: Deals Damage... and nothing else.
Royal Authority is the only Tank combo ender that does not have any kind of additional effect. To many, this feels like a missed opportunity.