It was explicitly the knockdown that Brutal Charge applies. The knockdown was removed in the first round of changes and myself and others recommended that we instead get an actually DPS focused trait to replace it (like a 5% crit chance bonus), other people were highly insistent that the knockdown be restored instead as clearly that's more important for a DPS spec than anything actually damage focused. Still don't understand their rabid love for that knockdown, at the time you could comfortably pick up Cataclysmic Shout for a similar purpose and Shield Smash is still available for a weapon swapping player.
Other suggestions were generally along the lines of "Make Red Warriors Heart function as a DPS cooldown with limited healing" and "Make Prey on the Weak a crit magnitude bonus".