Yeah dh has at least two great builds, a faster one the nat style and a slower ramp the unhallowed build, which I'd say is slightly harder to gear for if you're starting from fresh (depending on luck).
In comparison, the WD is gaining popularity but really has two viable builds and one zdps is ever asked for in groups. Which is going to change but I guess is along way away.
Yeah its a very strong build, but only a small portion of WD are able to gear and play that high. I still think its less requested, most wds running this build arnt capable of 40+, where any dh with the full UE set and a half decent bow won't find a problem lf groups.