Paid the price for it? WoD demo was the best spec I've ever played before they gutted its damage in HFC. I mean I started around the time of the AQ event and no other spec in the game flowed and worked quite as perfectly as WoD demo did. With the talent options, the kit, and how demonic fury allowed you to put your burst exactly where you wanted it or have awesome mobility it was the best spec ever. Sure it was complicated, but once you understood how each ability worked and what the trade offs were depending on whether you used the meta version or caster version then you had almost complete control of your damage in a way that was intuitive and fun to play with.