Still wondering what a slam dunk approach is. If it means to get down asap, to me at least it sounds like asking for trouble, especially with procedure-oriented Asian crews who are not used to deviating from the norm, combined with the lack of ILS/GS etc, and the seeming reliance of these crews on such aids even in clear, bright weather. Not to mention Asiana's CRM policies, which I am not sure has been mentioned.
ATC doesn't acknowledge his first call on 7-mile final. Maybe he felt he had to continue and sort it out, not incurring the loss of face that a go-around might bring. Not as bad as what ended up happening of course.
Fair points about fatigue/lack of familiarity with the region, but possibly all these factors together caused him to lose stability in the approach. At the end though, he wouldn't have been the only guy coming into SFO in recent weeks tired after a red-eye and not 100% familiar with the place.