PDS can be a tough school for a kid who isn’t fitting in to their scene. If you have a middle or high schooler there, you probably know (better than someone on the internet) if she would be happy there. This may be their gentle way of guiding you away from a tough time socially.
If she doesn’t want to repeat, it may not be the place for her. You are lucky to be getting a year to investigate this. Did you look at Stuart? It’s a little gentler on the social front so maybe you wouldn’t get the same resistance. You might be able to apply late (but I have no idea if that’s feasible. )
If you want to do it this year without repeating or expanding your list, it looks like RPS. Personally, I would be reluctant to repeat at a day school if I hadn’t been entertaining the thought already. I