More important than the person was the process.
Little Ricky said this himself - he wanted to go outside the organization, talk to a number of people, and evaluate his next coach while also learning about where managers though his team and the game would go. That would have been exactly the right process - some candidate or candidates would inevitably be the best. Maybe Bochy. Maybe Hinch. Maybe Hinch meets with the team and finds Detroit a better fit. Maybe it's someone completely unexpected.
At this point though, we can safely say it wouldn't have been LaRussa in a fair competition - because we've seen him in action.