http://na.finalfantasyxiv.com/lodest...582d59335acd84

Players must first complete the main scenario quest "Brave New Companions," and have completed Thornmarch (Extreme) and the Whorleater (Extreme).
Completion of The Bowl of Embers (Extreme) is no longer required to undertake The Whorleater (Extreme) or Thornmarch (Extreme).
Been this way since 2.3 first introduced it <_<