Yes I do! ds2 had a severe speech delay (dyspraxia was best final diagnosis), also with good understanding- causing him intense frustration. picked up before 2, and we started private speech therapy once a week around 3 because the group sessions we were attending through the local authority were not very helpful, the private therapist introduced makaton which helped with his frustration over communication. At 4 he was making progress and we finally got some state provision (SALT and action+), but while at nursery there was discussion about whether he should join his brother at mainstream state primary or might be better at a school with special provision. He went into reception struggling with concentration, social skills and communication. Like your daughter, he would not join in role playing or cooperative games, just running and chasing, and not know the boundaries of where to stop sometimes.
He is now just 7 and in Y2, still on action+ and having a once a week session with a TA under supervision of SALT. Ahead of the year in maths, reading well, communicating and contributing in class, with a great group of friends, and a much happier and more confident little boy. His speech is still sometimes a little unclear - more like a speech impediment now - and his grammar is a little behind eg mixing up pronouns, simple sentence structure, but still progressing.
In some ways I feel he just grows up a little slower than his brothers but gets there in the end (luckily he also has the advantage of being old for his school year). However, I have to say that the SENCO commented that there are two boys higher up the school with similar speech problems, and they have not made such rapid progress. I have to say that having the option to go private helped us, and I know not everyone can. Partly having the extra focus on him, and partly having the sessions with me at home so I could continue the exercises during the week. We also got a block of sessions with a brilliant SALT at the Nuffield Hospital, top unit for speech disorders in the country. This had a lot to do with being a pushy middle-class parent always asking what more we could do.
I still find it very hard to say whether I could have relaxed more and it would still have all come OK, or whether his progress has been helped by all we did - physio for his motor skills, assessments with the neurologist, endless bloody speech assessments and the drills and exercises. There were behaviour issues and some physical issues which I think were/are partly to do with the dyspraxia and partly with sheer frustration of being a bright kid who finds it hard to talk. He is still definitely my most challenging child! But at age 4, I would have found it hard to believe how brilliantly he is doing now - so I hope that is some kid of reassurance!
sorry for the essay.