Many people had raised hands when we went to cold calling. It might be good to have someone monitoring that function when Professor Nesson can't. The threads discussion, and the timing of it, was helpful for me. I'm not sure how others experienced it.
I'm with moon. No need for cold calling anyone over someone who actually wants to speak say something. Also, so what if someone does not speak up in the breakout room? I rather have genuine conversation than forcing someone to move their lips and making sounds for the sake of doing it. We can't all have opinions about everything.
I like cold calling personally. The Socratic method ensures opinions, attitudes and biases are tested and analyzed more objectively without the constant virtue and value signaling common in non-Socratic classrooms. It fosters the discussion and exploration of honestly held and even incomplete views without being drowned out by the noise of a rehearsed, vocal minority