In these cases, students must learn to cope with heavy overloads of knowledge and information. You learn to cope by coping. Here was a case of objective overload. I was trained to deal with such issues, as is the case for most scholars and researchers. And, the training was largely sink or swim.
Education is the antidote to information overload.
The Harvard Business School's case study approach puts heavy emphasis on operating with incomplete information. Should be long on practice and short on theory.