(opinion)
As a tank I will never vote to remove a healer that keeps me alive. If a healer that has not let me die is removed, I will consider leaving the run. I will in fact vote to remove any healer that consistently "lets" party members die for any reason. I will give my commendation to a healer that is going above and beyond the minimum requirement of keeping people alive, if all they do is heal and someone else is using all of their toolkit then they will get my commendation.
(/opinion)