I would argue that many more people monitoring can encourage the fear of making the wrong call. "Hey, someone smarter and more experienced than me should makes sense of this." "Hey, the smart new guy is supposed to be watching this. I will look more closely later."
What you want is two or three people really in charge, where the individuals are empowered to say: "I am totally confused. If someone cannot explain what is going on to me so that I understand, I am starting shutdown procedures, immediately. Do YOU know exactly what is going on?"