As one who regularly flies heavies throughout USA the big concern with visual approaches is the lack of protection from other aircraft. The restricted vision and manoeuvrability in a B744 means, to me, that it is unprofessional to give up positive radar control.
As far as SFO goes, regular "slam dunks" are what I am used to.
I'll await the investigation results before passing opinions on the accident although I would ensure, if possible, that the engines were shutdown before evacuating.