I am not too familiar with hip dysplasia so can't comment, but for the hip with FAI (and just generally) I recommend that you consult with a hip surgeon who fixes FAI and labrums. Fortuitously, perhaps the most highly regarded such doctor in the entire world is located in Vail, Dr. Marc Philippon. For someone so young, fixing the labrum and the FAI should be considered before a resurfacing.
As way of background, I am 43, have FAI in both hips, had one resurfaced last year (with the amazing Dr. Gross) and am leaning towards having the other done next year. I have had hip problems since I was 11. When I was 14 they were talking about bilateral hip replacement if things didn't improve. They did, and aside from one flare at 18, I had little only relatively minor hip problems from 15 to early thirties (after which I had an eight year odyssey of pain and misdiagnoses).
I do not recall (being just a child at the time) if there was a diagnosis in my case beyond "inflammatory arthritis". My understanding is that the hip labrum and FAI was not well understood in the medical community at large until ten or 15 years ago (I'm generalizing). Even now, it was much harder to educate myself (using the web) on FAI/labral problems than it was on resurfacing/replacing.
Check out Dr. Philippon. I hope that you find the best possible treatment for your daughter.
Mike