Yes, I have read the FOIA report, including the transcript of her questioning. In that transcript she did mention her work as a waitress, so I'm not sure what they're referring to when they said "she left out..." The questioning was straightforward, and her answers were honest. She did not withhold any information.
Reading through the entire FOIA report, I have a hard time imagining how anyone could construe what she did as fraud or misrepresentation. I am including screenshots of the relevant part of the interview. The only thing I can see that the "she left out..." might refer to is that the first time they asked her about what kind of work she did she didn't mention the waitress job, but shortly thereafter she did mention it.
Returning to the question of how we should proceed, I appreciate the clarification about the difference between the application being denied and the visa being refused. I didn't understand that previously, and that's why I thought it was risky to go ahead with the interview ASAP. So based on what you've told me, I don't see any harm in going to the interview as soon as we are able to. I would imagine that it is 100% certain that the visa won't be approved since the 5 year bar hasn't elapsed yet, but now I understand the usefulness of the interview in terms of understanding what needs to be done in order to finally overcome the refusal. It seems to me there are two possible outcomes of the interview. 1) They just advise us to wait out the 5 years, or 2) They tell us an I-601 is needed.
Would you agree that those are the only possible outcomes of an interview prior to the end of the 5 years?