I work for a post house in which we turnover edits for color and conform frequently. We often use mixed framerate footage in our edits, including 23.98, 24, 25, 29.97, 30, 50, 59.97, 60 etc. Currently, when you want to send a reference edit with source clip timecode burnin, you use the timecode burn-in function on an adjustment layer. In order to get Premiere to recognize the correct timecode of the source clip on the track below, you have to manually cut up the entire adjustment layer, go into effects controls and change the framerate time display individually for each clip with a different framerate. This is time consuming and can be fixed with a dropdown in effect controls with something along the lines of - match time display of source clip on track 1.
Thanks