I've not really contributed anything to this debate, but my purely personal view is as follows.
The few times I've played with Ursan users in PUGs, they have been, without exception horribly selfish and apparently unskilled players. Here's and example. For some illogical reason, I like helping players through THK. In a recent group, the only Ursan decided he was invincible and despite everyone else agreeing to camp the king, rushed off and aggroed multiple groups. Despite our best efforts we wiped.
I'm not saying all Ursan users are like this, but I don't use Ursan, and in future will probably avoid pugging with Ursan users.
However, I don't see any need to nerf it. Just make a small change so any toon with Ursan equipped shambles about with its knuckles dragging on the ground, so I know who to avoid.......