So here's my summary of the interview with Mary Miller.
She really pressed on the question why I want to switch my career from litigation to finance and why I went to law school given that I did engineering to begin with at Columbia where I could easily have gone to IB. Then she asked why I need an MBA since quote-unquote " a top 5 law degree with an ivy undergraduate can probably get you an IB associate gig." She then asked me what I would bring to CBS. Finally I asked her a couple questions. It was not a "casual" conversation but very probing and grilling. She wanted to get to the bottom of the whole matter.
In terms of how I did, I think I did pretty well. I laid out all my reasoning behind the switch and backed it up with examples and introspection.
At the end, I asked her how soon I would hear back. She said quote-unquote "very very soon, mm.. 2 weeks at most, but can be much sooner, I just want to play safe on the timeline." Then I ended the interview by saying " I hope to see you next fall." She responded without hesitation "absolutely." I don't want to read too much into it.