I very rarely show any preview of Mix or Composing work I do.
I may be excited, but the client needs to hear the finished work, not bits and pieces that I understand but they won’t as they are used to songs on the radio that are always finished or their song that was always in-pieces.
Finish the whole job and Deliver. Let them decide if the need an alteration or not. Don’t encourage them to get in and start using you like a puppet or you can never do your job properly.
Hint: I will have clients try to tell me how to compress things. I don’t care. I will decide that when I am working on that material - never before. If they know so much about mixing, they wouldn’t need me. They may feel inadequate in needing me (poor tiny tackered tiddder) but they still chose me because I am good at what I do so letting them interfere is me not being good at what I do.
Positive communication however I really encourage. Anything related to who they are, what the message of the song is (rarely as detailed as they try to tell me but this I understand) welcome. This sort of interaction (not joking about hot chicks or beer drinking) helps me return a better mix.