I want to take the time to acknowledge Dad-sama. He's been supporting them so much the entire time. I suspect he understands more about what's going on then Koyuki or Konatsu do. And he's backed them without blinking twice.
Very interesting take on gender identity and issues. It ain't perfect, because just like reality, it never is. People end up confused, uncertain, they overthink things. I'd say the series is nailing that cognitive dissonance quite well.
As an amusing side note, I experienced the water splash event in my first year of high school. Complete with the self righteous attitude the perpetrator loved showing off. As they walked away I caught up and dumped my drink bottle on them. I then asked how it felt being so graphically denigrated. The look on their face was priceless. Nobody in my year group tried that stunt for the rest of high school ^_^ .
There are conceited, condescending and opinionated people. Then there is Uta's mother. Surely someone would have the courage to just slap her upside the head and kick her out the house.