post will definitely build a mix, or at least reserve the right to. sometimes they use your mix. but a mix is still essential on set for comteks and video village. many who are listening don't really get the difference between monitoring and what is being recorded, and don't know about building a mix from your ISO's vs the mix on set. Also, in their defense, they want to get lost in the moment and watch the performance, and good audio ie the best mix you can on set is a huge part of that.