I think the purpose of the interview was to probably keep Bobby Kris in focus, knowing she would be preparing for the interview but also clear up many random rumours.

Pros are you felt the real Whitney be expressed through Pat. Bobby Kris although no way near the ok we would like is preparing her mind to move forward and do her mum proud. Random rumours put to bed. Ray J & Stacey Francis got a telling off but in a classy way.
Cons of this is that its so soon and there's a lot of raw emotion.