Sq/CCs have the functional's ear. You're just one of a bazillion guys they're trying to get put into the "right" job. In my 14 years I've sent exactly one email to my assignment team, and that was because it was requested by the functional. I communicated my assignment desires to my Sq/CCs through my ADP and let them work it.
Of course, I've had good commanders that cared about my future. That doesn't seem to be the case everywhere.
Edit: this response is general and not directed to Champ. Just quoted for context.