As long as either Stephanopoulos or Crowley moderate the rest of the format is trivial.
Stephanopolous has said he will not moderate any debates this year, given his recent foul publicity re the Clinton Foundation. In a sense it matters not because just about anyone they put in will be as partisan.
Oh, of course not, they will probably pick someone completely impartial, like Chelseahorseface Clinton, or Moooochelle Obama or maybe Alarceny Sharpton.