Every moderator is biased to certain degree so trying to find unbiased one to moderate debate is pointless. Instead they should bring one with obvious conservative bias (Hannity/Gutfeld) and one with obvious liberal bias (Maddow/Cooper).
This way both sides will be challenged every time they want to avoid to answer a question.
Yes, that is how news media should be in general. The Walter Cronkite figure is a lie.
Though I agree with others that the debate format is just stupid. The candidates should choose and ask the questions.