Where have you seen that “the built in one” will give them any information? That Combat Info API is private to Blizzard now, there’s no access to it during combat for 3rd party addons (or at least that’s what Blizzard has said below). I know Ion said that “customization of UI elements will still be allowed, just not auto-logic to inform the player what to do.” Ion also said (back in April) We want to roll these changes out over time, be sure we got it right, and then remove combat API access, but he’s flipped that script and is removing API access before the in-house capabilities are even fully developed let alone tested.