pou1990 i played crusader last season. The good thing about it is that if you got a group, hammerdin is almost viable.
In a 2man group i did a 97 GR run which gave us a spot in the leaderboards. It can replace the WD, one problem is lagg.
You can also play the healing crusader as support. These are of course not as good as the WD or the Barb support
but still almost viable until the very high end GR.
So it all depends on if you have to rely on public games or not :D.
(And for solo the crusader is gold, 85 in 7 min were no problem, t12 sage build was also very nice (google triumvirate))