This dropped for me while I was leveling my rogue. And while an awesome weapon, it's a clear indication of a huge problem with the game.
This is nearly a bis weapon for the rogue, and is minimum level. (I got it pre 65, but Ancestral Weapons have a floor of 65). That means for the next 35 levels, I'm never going to find a better weapon. But Level 1-65 takes almost no time to reach, whereas the time increases significantly post 65. Part of the fun of the game is when you are finding upgrades. But in a 150 hour leveling process, if you can get the best possible gear in the first 20 hours, the next 130 hours just becomes a boring slog.