This is nearly a continuation of a discussion I was in last week with a Course Director. His take is that the online classroom is not working out well. Many students appearing at his door supposedly ready to do the pool and open water work have shown an alarmingly shallow understanding of the basics.
As he said, part of the classroom experience is the face to face, the feedback, the illustrative personal experience stories, the interaction between students, and the beginning of building the buddy systyem attitude into the students right from day 1. This, he said is noticeably absent in the online student. He is at the point where he interviews these students, and will not accept them into his classes if he feels they are not qualified, and this is creating problems between him and his agency.
He is also quite concerned that this new online trend is then being combined with the vacation "referal dives" style of completing OW that has been going on for quite a few years now, where there can be a real lack of dedicated teaching. This often can result in "certified" divers, who should not be diving, with as little knowledge and skill as they have.