I did my first track day on the ///M3 this past Sunday, ran one session with MDM and went DSC OFF right after. Wanted to see if MDM was better than DTC on my last 135, and it kinda was, but still too intrusive at times, specially slow speed, high load corners.
DSC Off, car feels much more balanced and predictable in way, but the obvious fact that'll be easier to get out of control if not one is not careful.
DSC OFF I say