John Marson wrote a book call, The Book of the Harp. In it he argues in favor of playing the harmonics an octave down. Although I don’t agree with it, it is a pretty interesting argument. Hope this is helpful!
The pedal errors are obvious, and will not be a major surprise. Note changes will. I recently reworked the whole piece with a new interpretive approach and would not be happy to have to re-learn it again.
I didn’t know you wrote an essay on Hindemith Sonata!!! Is it possible to read it? That would be great because I’m learning it and would like to research more about it.