Have you tried social skills therapy to help her with her pragmatic skills? It is working for my son pretty well, and some of his physical communication is being replaced with words. It's helpful for him and he's coming along, albiet slow, but he's moving.
I agree with allowing your child to be themselves. I do that with my son as much as I can, especially at home. I try to remember that this is a developmental disorder, some things will take a long time to develop, some things he is way ahead on and some things he will probably never be able to do like NT's and some things are typical. I pick my battles, and let go some things if they really aren't hurting anything, and I keep reminding myself that this isn't forever. Bigger challenges are ahead. These kids grow and learn like everyone else, just in a different way with different supports. I look at plateaus as a preliminary growth spirt. If you child is anything like my son, he will process in his head first, and when he's ready out it comes in droves. He waits and grows slowley, and then he blows my mind for a few months and then levels out. 3 weeks ago is nothing, look more like a year. Some things take a really long time.
People look at my son, or me more often, and believe he's spoiled and gets away with murder. He really doesn't, and he's a really good kid who doesn't always react appropriately, but he can't help a lot of things he does so we work on that. He tries, and he improves in his own way. I can't ask for more than that. The way I work with him takes time and patience, lots of it, but I teach, and teach, and he learns eventually.
Hang in there, be patient, and relax! She will come to things in her own time, and in her own way. My son is unique, and the most interesting kid I have ever met. I'm sure yours is too...look at it that way!