On n'est pas plus avancés si le débat continue, mais si, après la comparution du témoin, elle répondait à des questions précises et intelligentes, oui, elle serait extrêmement utile.
It would not be helpful if the debate were to go on and on, but if, after the witnesses' appearance she were to answer some specific, intelligent questions, then, yes, she would be extremely helpful to us.