I haven't read the BALPA article (not being a member), but I have questioned the stuff we are supposed to teach more than once. For example, one of the traditional "decision making" models:
G ather all relevant information, using your senses
R eview it
A nalyze alternatives, keeping situational awareness (big picture)
D ecide and Do - make your choice and act on it
E valuate the outcome - be prepared to start all over again
only actually covers decison making in the last two steps - the first three are to do with problem solving, which is something entirely different. You can only make decisons when you have the alternatives.
If, as Mike Jenvey, says, DM is flawed in the first place, due to SA, we could be working on the wrong premise.
Phil