Hi medopharm,
If I were you, I'll keep those additional proofs you got right now so that when she goes for interview she carries something which will attract the officer's attention than walking bear handed just to come answering questions. You can still send those proofs with the hope to wave the interview but what if they don't wave it and still want to meet your wife in person in order to find out whatever they want.
You are her husband and comforter in these difficult times, when you start panicking on the phone you are just making things worse without knowing. Remember you will actually plant a seed of fear and panic in her, so at the time of that interview a tree of fear would have already bore fruits then end up getting rejection simply because she would panic and display deceptions in her body language. You need to prepare her mentally to be positive, remove fear in her with more assured words. Where do you think I got this little knowledge and experience I got with PR process? I went through thick and thin my friend but I had always have faith in someone who is above me and CIC, that is why I don't panic like I see people doing in this forum. There are questions people never asking me on this forum which is fine with me. I know how a complete GCMS notes look like when the visa is issued and CoPR printed and I also know how a Refused case look on GCMS notes because it happened to me in the past. I believe that made me more stronger and I do sympathise a lot with people because I went through what they are going now.
In short medopharm, I trust you will be a positive image in front of your wife. She probably does not even understand what she is about to go through and all she knows; she has a man who seems to be in control. You got to face this with wisdom and ask questions to people you will be alright. You can choose to send those proofs if you wish so at the same still prepare your wife mentally how to handle those 30-45 min interview. Remember she can still speak in the language she is comfortable in to reduce the stress or panic in case she will be. All the best and I will put you in my prayers.
Best Regards