Yes, I agree that she should be comped. Of course, doctors have the obligation to help and I guess anyone in that situation would not have hesitated.
However, I do not think it is bad form to expect a little act of appreciation from the airlines. Now, while it may be inappropriate to expect reimbursement from the patient, the airlines is a service provider and the OP's wife is a paying guest.Furthermore, Brunei air is a full service airline, not a budget one, so it is reasonable to expect some form of 'hospitality' from them.
I think they were very ungracious in not allowing the doctor to be moved to the Biz cabin for easier access to the patient and leaving her to fend for herself afterwards is also quite shocking, IMHO. The least they could have done was to get someone from their office to fast track her and offer her lounge access and free upgrade on that connecting flight. These are simple acts that will cost the airlines zero cents.