I just tried it for the first time and we couldn't beat the last boss. It just takes way to long to kill the trash mobs, and the last boss is death incarnate when you are playing a BLM. There are way too many things to dodge, leaving no time to cast, and if you can't attack you get overrun with adds. I don't expect dungeons to be easy, I like a challenge, but that is ridiculous, especially when the best new skill we got as BLM (ley lines) is useless in most of the new dungeons because you have to spend too much time dodging.