I've found it (GPT4) to be quite good at analyzing situations where roles & responsibilities have become blurred. I've asked it for recommendations on how to approach delicate conversations with the people involved and it gave solid advice. It was also useful in brainstorming potential objections that might come from those people and effective responses to those objections.
It's long gone, nothing special, just uploaded a screenshot of the raci as it was being edited in a spreadsheet. Then just explained the context and the teams listed.