We had a situation this year where a teacher, who brought out mixed reviews for over 20 years, was suddenly no longer working for the school. As president of our school's parent group--I heard both sides of the "story" from witnesses regarding the supposed issue that led to the teacher's departure. .but there was nothing I could, or should have done in my role-much to the chagrin of some parents. The fact is, it was a personnel decision of which NO ONE outside of the administration had a right to know all the details--for legal and confidentiality reasons (If you were a terminated employee, would you want your former bosses to share all the details? Come on. People can sue for that.). In the end, my role ended up being trying to explain that to parents and trying to take the heat off of the administration. Unfortunately, too many of parents thought they were entitled to know the details and several months later, there are still divisions.
Several years ago, we had another teacher who was reassigned to a home room class after teaching a speciality course. She was not the strongest disciplinarian, not overly organized, not very strong in some critical subjects, and she had a tough class of kids for her first year. There were a number of parents calling for her head, practically, and others with kids in the upcoming class who were hearing the horror stories and reconsidering re-registration until the issues in question were resolved. In this case, the parent group asked the administration to have a meeting to discuss the concerns and they did meet, got details and tried to work with the teacher, while continuing to get feedback from the parents who had children in the class as to the progress. The problem was, we had parents who were only going to be happy if she was terminated. In the end, she was reassigned to teaching something that was more within her core skills, and she has been doing very well there since.
I'd say--bring up your concerns about her style and make sure they're addressed, but trust the administration to look into it and make a decision that is in the best interest of the students. And whatever the decision is--remember it's HR related--and therefore, as parents, we're not entitled to know all the details.