OP, of course you can post on here anything you like. It's a forum for parents about Higher Ed! Your feelings are totally understandable. The results were only the other day. I don't care what anyone says, applying to Oxbridge is stressful - getting UCAS in early, submitting work, admissions tests, interviews - and then the way all results are released in one day builds the whole thing up into even more of a massive hoo haa.
This is just a point in time - your DD has so many options. Request feedback - they will probably give you an overall interview score. Was she interviewed at one college, or was she also sent to a second (or third)?
If this is any use, my DC applied twice. This was to C though. First time they were pooled, but not offered a place. The feedback stated they were given a '7' average for the 2 interviews. The tutors said something like -"We had sufficient confidence in your application to place you in the winter pool and were very sorry to hear you were not made an offer by another college."
Someone correct me if I'm misremembering, but (I think) C get about 24,000 undergrad applications each year. I think they make about 3,000 offers, but put that number again into their winter pool. If they are put into this pool, it means they are considered worthy of a place, but there were others with slightly stronger applications.
I once saw a form C use - there was a section for the contextualised GCSE scores, a section for the admissions test scores (if applicable). Predicted grades are not 'scored' as they are a guideline only and will vary teacher to teacher. For the interview section it was something like - 10 (must offer), 9 (worthy of an offer), 8 (probably worthy of an offer), 7 (possibly worthy of an offer) and so on. Which leads me to think they do put quite a lot of emphasis on the interviews.
Also, I don't believe interviewers are experts in spotting 'genius qualities' or whatever some people may think their DC displayed in interviews. Most of it is luck on the day. Many interviewers are a bit 'odd', to say the least. Apart from a few stand out individual applicants, the bulk of them will be much of a muchness. But they have to decide between them somehow. When DC re-applied the next year, they had a much better interview and offered a place. Has found it fine. This was for a social science with about 20% offer rate (I think).
When we saw the stats, the college had interviewed 40 and made 7 offers. But, in the October, only 6 were actually in the course. - and one of them had got in last minute from the summer pool (a small reserve list for applicants who meet certain WP criteria). So does that mean that two offered places didn't get the grades - A star, A, A? Who knows. I bet most of the 40 interviewed got above the minimum grades though. So it just goes to show.
Your DC has other great options, by the sound of it. If they are going to reapply, all I would say is -
Only do this if they have all A stars achieved and (particularly she's from a high-performing grammar) near perfect GCSEs, although GCSEs are less important once they have the actual A-levels. I think, in humanities, about 50% at Oxbridge, will have all A stars achieved, so having those same grades places you in that upper half of the cohort, if you see what I mean.
Only do this if she has a definite gap year plan that will be worth it, regardless of the outcome. Eg, if they can do something overseas, you'll be amazed how they quickly gain a healthier perspective on all these unis and realise O and C are just two unis in the entire world!
Do something in the gap year that is relevant and will boost the application. They will expect 'more' from gap-year applicants. If your DC is doing a language-related course, could they go to that country and work / volunteer? A gap year can be brilliant in so many ways - they gain so much confidence, mature and are just more 'ready' for the workload when they get to uni. But - have a plan!
Sorry, this turned into an essay. Phew.