Ryno as a bench or base coach next season won't help him out that much. I think a lot of people don't know that Ryno is the 3rd base coach for the I-cubs. So he already has that experience.
I think the managerial job will be filled by whatever kind of team Ricketts wants. If he wants to go young and fast, such as Tampa Bay, then I think Ryno is the man for the job. If he wants to go veteran (and there isn't much evidence that is the case), then Girardi should be offered the job. If he wants a mix of both (my guess), then someone like B.B. could fit the mold.
Also, would you rather pay Girardi 6 mil or hire Ryno for 3 mil, and spend the extra cash on a player that can help the team? That's a tough call. If managers don't mean that much to a team, as some people contend, then spending the money on a player would probably be a better idea.
Yes, he would benefit from being a bench coach or a base coach next season. He's never dealt with major league players before, it's not that he needs practice coaching 3rd base, he needs the experience of dealing with MLB players every day.