Well, I realize part of the problem is that there is a limit to how many fates can spawn in a given area / level range. If there are two or three fates already in the subzone, you may need to clear those to get your fate to appear. I think that's why you can get hour long wait times occasionally.
But waiting for specific fates was a terrible mechanic in general, and I'm glad we've moved away from that in 3.0. If they don't adjust these beast quests a bit, I just know that this is going to get REALLY annoying in the next few weeks.
