The unique dialogue/narration of the Dark Urge reminds me a lot of the Malkavian route from Vampire the Masquerade Bloodlines. The occasional loss of control and random bouts of violence really help put us in the mindset of a sociopathic murderer. Really want to play as them. I will try and 'limit' my acts of violence, but for how long I wonder?
The Malkavian wasn't violent though. Their whispers gave them insight.
And the Dark Urge has insight on how to murder people :P
On a serious note. There is nothing right now, confirming that playing as the Dark Urge you are forced to commit evil acts, or that you have no control. You probably have to face your past, and some troubling things or dilemmas/influences, but the whole point of such an origin, is the form of tragedy within, struggling against a fate that seems unavoidable, trying to get cured of the stench of murder or violence although it seems like it won't leave you and has left a permanent mark on you. And that road, the atoning/redeeming one, should have an equal weight and reward both role-playing wise, and mechanically(loot and powers) wise.
Struggling against such a fate is a very popular narrative, and i refuse to believe that TDU is just a way to play as a murderhobo. You were a serial killer and you remember nothing. What will you do now?
As for Tav, i honestly think that they should get something unique to them as well. Or else Tav is custom origin from DOS2 again. Unless that's what they meant. That the way they had to deal with that problem, is actually the Dark Urge, a Tav with a backstory you will encounter through the game.
Why else would you be able to customize everything about TDU, race/class/name/appearance?
And btw, you don't automatically kick the squirrel.
