"Number-one" is a traitor to the republic, at the moment sitting in a republic-military-prison ... or dead.
Well, in my story, he's dead, but that's a Trooper complaint for an entirely different topic.
And once you're dead, you're out of the ranking.
That said, you raise an interesting point, and if not for that poorly thought out choice being an issue, I would totally rather have that character than Vik. I think he'd be a more compelling companion, really, and it'd have the potential to make the story from Trooper chapter 1 more meaningful.