Ultimately the teachers are still good and professional teachers, they've not been the happiest this year but they're still doing their jobs well. I think it would be fine for your daughter, and like I say with a new crowd of teachers coming in, that haven't been affected by the changes this year, I would have thought morale would pick up.
I was still considering applying, despite being advised against, but got a job elsewhere.
Re. the music post, that was just a random one I chose, I don't know if it actually changed this year. It was basically just a case of a new head coming in and taking positions of responsibility away from staff and making them reapply for them. It was odd because it was early in the year and so contracts had been signed and staff still had to be paid the full amount even if losing their post. Maybe it was just a Head trying to make their mark. As for the blog, well who knows what was going on in her head there, I never read it so don't know how bad it was, I just know what I heard from staff a couple of months ago. Hopefully someone will come on and clear things up for you. I did see a couple of posts on TES but they disappeared pretty swiftly.