confuse on Hero 4th job skill

From what I've read, the skill ID for Brave Slash is the same as today's Brandish. That means if you have maxed Brandish today, you will have maxed Brave Slash automatically after the Big Bang patch. Presumably every Brandish mastery book already in the game will become renamed Brave Slash.
However, you will have no points in the new Crusader skill Brandish.