It has definitely been freeing for my family and I to accept. It inspired a lot of introspection and growth as I could question my reactions and reject them more easily. It has also made me less fearful of rejection and failure because I understand why not everyone can get me which has made me more outgoing and led to expanding my social circle and experiences in great ways.

The only reason it might be helpful with your DD is to explain it to her new teacher each year? Then they can make allowances for her (with routine, etc.) and also understand where she's coming from?
This isn't a concern for us currently as we will be homeschooling but should that change or DD1 request to go to school then we will probably need a diagnosis to help her and others relate. With kindy there does not seem to be issues as it is only a 5 day fortnight so lots of recovery/down time and there is a lot of freedom and self direction which suits her perfectly as she doesn't like to move on from things before she is ready/finished, she likes to explore things quite thoroughly and the restrictions of timelines and timetables will be difficult for her to abide by should further schooling be pursued.