From what I've seen they're pretty poor right now. Our Guild BrM is really unhappy with the changes, and is now actually considering dropping BrM and maining WW. I had a look at the mechanics on my own, and it looked like it had the potential to work. But I think that right now it's abilities are so weak and the amount of effort required to survive for them is way higher than other classes and without changes many will just not play them when something like a Warrior with Ignore Pain is just so strong.
Unless they get some major buffs to most of their abilities or a bit of a rework I think they will stay a rare sight.