Kane definitely has a pattern of behavior that suggests he doesn't have an ounce of remorse, no argument from me there. That arguably makes him worse, but I don't think that feeling remorse absolves DeSmith. There's no excuse to do what he did. Does he have the right to pursue his goals and live his life? Yes, of course, but I don't think I'm out of line at all for not wanting him on a team that I support.
Specifically regarding Voynov, the way that he tried to weasel out of the situation really underlines that he didn't accept responsibility for what he did. He tried to argue that his wife didn't speak English and couldn't understand the police questions, even though her injuries were perfectly consistent with the story that she told. Then he pleaded no contest, which further reinforces that he didn't care. The man is a coward, he's scum and it's absolutely unconscionable to me that he could be reinstated.