Just a quick update with pictures of the finished coat. I'm happy with the result.
When I started making this coat, I was a little afraid it might be too special for my daughter to really wear it. Most 14 year old girls don't want to be too special. And of course I asked her before I started whether she really wanted it, and thought the answer was "yes", but you never know before you're finished.
And it looks like she's going to wear it, she was really smiling and happy with it. The only extra I did was adding a small shoulder pad and adding a little piece of fabric in the sleeve head, to make it more smooth.
And I omitted the buttons on the collar.