I don't know. DOA seems more like Mike Ehrmantraut to me. Gus tended to hide his emotions. And that's not taking anything away from DOA. It's just that, like Mike, DOA doesn't hide his emotions (like Gus), yet he took care of business and did a hell of a job cleaning up messes - whatever it took. Dude was effective. And there was no fucking about. That's the way to do it. IMO, DOA needs to be rehired as a mod.