What would be the point of carrying one if he/she can't deploy it properly? The DSMB and reel can become an entanglement hazard if improperly deployed.
True, many people are doing AOW directly after OW and perhaps the introduction in AOW is more appropriate, but I've found, personally, OW and AOW are for introducing skills but not for actually practicing it, at least not enough. If someone asked me if they should do AOW directly after, I would tell them to do some fun dives to practice what they learned in OW first, then move onto AOW once they've gained confidence in OW skills.