I love Lance. But I am partial to dirt dogs.
He'd def make us tougher. And I invite any one to argue that he was the best player for the Pacers (and at times, on the court) against the Heat in the playoffs. He's a beast. If a team/coach feels they can tame him enough to the extent that his productivity outweighs his behavioral issues, he's a solid asset imo. The glaring problem is that his contract sucks, though.
Edit: Imagine what he would do, psychologically, to someone like Olynyk? Disastrous. But imagine what we would look like in the defensively (exclusively backcourt) with him and Smart on the floor together?